- STRDH190 2-channel Home Stereo Receiver with Phono Inputs & Bluetooth
- Karaoke Wireless Bluetooth Amplifier
- Karaoke Wireless Bluetooth Amplifier
- BT20A Bluetooth 5.0 Stereo Audio 2 Channel Amplifier Receiver Mini Hi-Fi Class D Integrated Amp 2.0 CH for Home Speakers
- DBTMA100 Black Micro Wireless Bluetooth 2 Channel Stereo Class-D Amplifier
- F900 2 CH Bluetooth Amplifier 100W with Power Supply Adapter DC 12V 5A
- Home Audio Amplifier Stereo Receivers with Bluetooth 5.0
- Wireless Bluetooth Stereo Mini Amplifier - 100W Dual Channel Sound Power Audio Receiver USB
- Bluetooth (V5.0) Stereo Digital Amplifier Receiver RMS 2X 40W for Home Audio Passive Speakers System
- Wireless Bluetooth 5.0 Stereo Amplifier System – 200W Hi-Fi Dual Channel Sound Power Audio Receiver w/USB
- TDA7498E 2 Channel Home Stereo Audio Amplifier
- G5 100W Bluetooth 5.0 2 Channel Amplifier Mini Digital Class D Stereo Audio Power Amp Wireless Receiver
- Wireless Bluetooth Stereo Amplifier System
- Bluetooth Amplifier Board TPA3116
- 298A Wireless Bluetooth 5.0 Stereo Audio Amplifier
- MC900B Amplifier for ATV UTV Car Marine - 500 High Output
- Nobsound Mini Bluetooth 5.0 Power Amplifier
- BT10A Bluetooth 5.0 Stereo Audio Amplifier Receiver 2 Channel Class D Mini Hi-Fi Integrated Amp for Home Passive Speakers
- Wireless Bluetooth Stereo Power Amplifier - 200W Dual Channel Sound Audio Stereo Receiver w/RCA
- Wireless Bluetooth Karaoke Amplifier Home Car Bus Tours 300 Watts 2 Channel Digital Home Audio PA Receiver System 2 Microphone Input Control
STRDH190 2-channel Home Stereo Receiver with Phono Inputs & Bluetooth
Amplify and enjoy your home audio experience in the comfort of your home
100 watts x 2 (8 ohms, 1 Kilo Hertz). Speaker impedance - 6–16 ohms
Phono input, 4 stereo RCA audio inputs, 3.5 millimeter input, stereo RCA output
Built in Bluetooth lets you wirelessly stream your favorite music service, podcasts, and more from other Bluetooth devices.
Connect up to 4 speakers; A/B switching to play all at once, or in separate zones
Low profile design (5 ¼ Inch tall) fits easily into conventional AV cabinet
FM Radio with 30 station presets;
Full size (1/4 inch) headphone jack
In the box: Remote (RMT-AA400U), batteries, FM antenna
Karaoke Wireless Bluetooth Amplifier
500 WATT POWER: The Pyle 4 Channel Bluetooth Home Audio Amplifier is perfect for your PA and home theater entertainment. It gives you 500W peak power which can be used for multi speakers with 4-8 ohms impedance allowing you to enjoy high quality audio
BLUETOOTH COMPATIBLE: The professional integrated indoor house stereo receiver is equipped with bluetooth wireless music streaming. Works with today’s latest devices including smartphones, tablets, laptops and computers with hassle free receiver pairing
7 INPUTS: The personal portable digital amp box supports iPod or MP3, USB, micro SD, AUX playback, built in FM radio with digital LCD display, audio input and REC, plus subwoofer output RCA (L/R) connectors, 2 ¼” microphone inputs with echo
TALK OVER BUTTON: The compact speaker amplifier features a MIC talk over function which, when activated, the current music or audio being played will be temporarily halted. This function is used in paging, voice over, and announcements
EQ CONTROLS: The sound amplifying device has crisp buttons for the audio sources and selectors, rotary knob for equalization, mic and master volume adjustments. A remote control is also included in the package for distant audio adjustments
"Packaging May Vary"
Karaoke Wireless Bluetooth Amplifier
600 WATT POWER: The Pyle 6 Channel home audio amplifier is perfect for your PA and home theater entertainment. It gives you 600 Watts peak power which can be used for multi speakers with 4-8 ohms impedance allowing you to enjoy high quality audio
BLUETOOTH COMPATIBLE: The professional integrated indoor stereo receiver is compatible with wireless bluetooth and works with latest devices, including smartphones, tablets, laptops and computers. It also has a headphone jack for audio monitoring
6 INPUTS: The personal portable digital amp box has a USB flash drive / SD card reader for MP3 / WMA playback, AUX input, dual 1/4 inches microphone in, and RCA connector. It also has FM radio with digital LCD channel display, push type speaker connector. Bluetooth Connectivity - Wireless Range Up to 40 plus feet
TALK OVER BUTTON: The compact PA amplifier features a MIC talk over function which, when activated, the current music or audio being played will be temporarily halted. This function is used in paging, PA, voice over, and announcements
EQ CONTROLS: The sound amplifying device has rotary knob and crisp buttons for treble, bass, master volume, echo, mic volume, mic tone configuration and source input mode selector. A remote control is also included in the package for distant control. Convenient Audio Source Control for Home or Office Use.
BT20A Bluetooth 5.0 Stereo Audio 2 Channel Amplifier Receiver Mini Hi-Fi Class D Integrated Amp 2.0 CH for Home Speakers
Simple compact design but practical and powerful, little Hi-Fi Bluetooth wireless amplifier exclusively designed for the customers who pursue HiFi sound.
Bluetooth 5.0 core, up to 50ft connection range guarantees low signal delay. No pop, no audible noise when Bluetooth connection is established.
100W RMS X 2(4 ohms, 20 Hz - 20 kHz, 0.04% THD), comes with a 24V power supply, can drive 280watts(8 ohms), 320watts(4 ohms) speakers, (for passive speakers only, not the powered speakers).
Advanced circuitry design, built-in speakers protection circuit, best for bookshelf/computer/desktop/speakers in your home.
What You Get: BT20A home integrated digital amplifier x1, 24V/4.5A power supply x1, user manual x1, our worry-free 18-month warranty, and friendly customer service.
DBTMA100 Black Micro Wireless Bluetooth 2 Channel Stereo Class-D Amplifier
Bluetooth 4.2 Connectivity – Your Portable Bluetooth Micro Amplifier Will Connect Effortlessly To Your Smart Device, Will Remember Past Paired Devices For Instant Connectivity And Maintain A Strong Wireless Connection For Up To 100 Feet
Dual Channel Class D Bluetooth Amplifier – Your Portable Bluetooth Dual Micro Amplifier Enables You To Have 100 Watts Of Peak Power, 25W X 2 Rms, 4 – 8 Ohms Of Impedance & A Frequency Response Between 20Hz-22Khz For Unrivaled Sound Quality
Wired Speakers Into Bluetooth Speakers – With Your Micro Bluetooth Amplifier There Is No Need To Replace Your Wired Speakers, Just Insert The Speaker Wires Into The Quick Release Terminals And You Instantly Have Bluetooth Speakers For Your Enjoyment
Illuminated Heat Sink & Front Panel – With Its Illuminated Heat Sink And Front Panel That Includes The Volume, Bass And Treble Rotary Knobs This Will Be A Statement Piece Like No Other
F900 2 CH Bluetooth Amplifier 100W with Power Supply Adapter DC 12V 5A
50W+50W DUAL CHANNEL: F900 bluetooth receiver amplifier provides 50W+50W dual channel stereo output with the upgraded chip TPA3116. Impedance: 4~8 Ohm.
THREE INPUT OPTIONAL: Supporting AUX/ USB/ Bluetooth input. But the amp module can be searched and connected via Bluetooth when unplugging audio input line. Insert audio input line, then it will auto switch to wired input mode, Bluetooth function will be lost.
SUPER COMPATIBILITY: Our Bluetooth audio transmitter can be widely applied to various tablet PC, TV, smartphone, Laptop with Bluetooth and etc, versatile and simple to use. But it does not apply to a range of products launched by Amazon such as Echo, Alexa ect. and Bose Speakers.
MINI ELEGANT SIZE BUT POWERFUL: Ultra small size (3*2.7*1.5 inch) with metallic colourful shell, advanced technology and chip, our Bluetooth stereo amplifier has good sound quality, no distortion, no humming or hissing and sounds clear, crisp.
1-YEAR WARRANTY: We offer 1-year guarantee period. If you have any questions or concerns, please don't hesitate to contact us. 【Regarding the power-on sound of the amplifier, we cannot change the program at present, please forgive me.】
Home Audio Amplifier Stereo Receivers with Bluetooth 5.0
☑️220 WATTS PEAK POWER: The dual-pass Moukey Bluetooth stereo amplifier receiver is perfect for your karaoke, home theater, acoustic sound system, and monitor headphones. Provide you with enough powerful power amplification, which can accommodate 2 sets of speakers, so that you can enjoy the home audio impact of high-quality audio amplification.
☑️BLUETOOTH 5.0 WIRELESS CONNECTION: The sound amplification mixer device is equipped with Bluetooth music streaming with a wireless range of 40 feet / 12 meters or more. Compatible with today's latest devices (including smartphones, iPads, iPhones and computers), this stereo amplifer is easy to pair with the receiver.
☑️MULTIPLE INPUT AND OUTPUT MODES: The digital amplifier box supports various external signal sources. 2 RCA audio inputs for tuner, CD player, tape drive, two 2.5-inch / 6.35 cm microphone inputs, headphone output port, USB, SD card, 3.5mm AUX IN and FM radio antenna. With RCA audio output, 2 pairs of banana plug speaker output. With the special monitor headphone output design, so you can enjoy audio all the time without the worry that bother others.
☑️EASY BALANCE CONTROL: The improved professional compact bookshelf sound amplifier with clear, responsive buttons for mode control. Knobs control microphone echo / volume, balance, bass, treble, master volume, input source and unique folder / track.
☑️HD SCREEN: The integrated receiver for home stereo has a built in LED display w/ front panel audio control center. FM antenna and remote control are included in the stereo amplifier package for distant audio adjustments.
Wireless Bluetooth Stereo Mini Amplifier - 100W Dual Channel Sound Power Audio Receiver USB
100 WATT POWER: The Bluetooth Stereo Amplifier Receiver provides 50W+50W dual channel stereo output, Impedance: 4~16 Ohm. With unrivaled sound superiority and lets you enjoy high quality amplified audio.
3 INPUT OPTIONAL: The digital amp box supports AUX/ USB/ Bluetooth input. Easy to connect the amp to DVD/TV/PC/STB/MP3 Player thr the AUX Input. And through the USB Input, you can connect the amplifier to usb flash drives, the supported music format includes MP3/APE/WAV/WMA and so on.
BLUETOOTH CONNECTIVITY: The sound amplifying device is equipped with Bluetooth 4.2 wireless music streaming 33ft wireless range. Works with today’s latest devices including smart phone, iPad, iPhone and computer with hassle free receiver pairing.
MINI BUT POWERFUL: Don't be fooled by the size, it’ll give your entertainment system a serious boost. Compatible to for ipad, cellphone, MP3 player, CD player, dataplay, computer, decoder, etc. Use it in your car, your boat, your RV, your golf cart, your home— anywhere you need a great amplifier with low distortion and acoustically accurate reproduction of music.
BUILT-IN SAFETY FEATURES: Equipped w/shortcut, overload & overheat protection to keep this amp & connected devices functioning properly & safely. The built-in loudspeaker protection circuit protects your speakers from high volume bursts of audio.
Bluetooth (V5.0) Stereo Digital Amplifier Receiver RMS 2X 40W for Home Audio Passive Speakers System
【Upgraded Stereo Receiver with TI chip】 Compact D-class RMS 2x 40W amplifier & receiver, adopts Texas Instruments(TI) chip, be able to hook up with bookshelf speakers or other passive speakers (6-8 ohm speakers are recommended) , Perfect for HiFi music purpose and home audio entertainment, Creative sleep timer function makes your amplifier unique & more convenient.
【Strong Compatibility & Practicability 】 This bluetooth receiver works with all devices which is with an analog or digital output (up to 16bit/44.1KHz) via Optical/SPDIF/RCA/AUX cable. it also supports various resources including 1/4” wired microphone, USB flash drive. Adjustable L/R balance & EQ option: Country/Pop/Jazz/Rock/Classic/Normal.
【Latest Bluetooth 5.0 technology】 With additional Bluetooth antenna, you can connect any Bluetooth enabled devices up to 65 ft in flat area. Stream wireless music in every corner stably and lossless.
【Knobs Operation & Remote Control 】 Customize the sound output according to your request. Rotate knobs to control MIC Volume, ECHO, Balance, Bass, Treble, Master Volume, digital LED display ensures all operations clearly, Additional remote control makes it more convenient.
【5-Level Safety Protections 】 The built-in 5-level protection (overload protection, over-voltage protection, over-current protection, short protection, self-protection) makes both amplifier and your speakers more safer. 1-year warranty with new replacement in case of any fault or quality issues.
Wireless Bluetooth 5.0 Stereo Amplifier System – 200W Hi-Fi Dual Channel Sound Power Audio Receiver w/USB
200 WATT POWER: THE 2 channel Bluetooth 5.0 stereo amplifier receiver provides 200W/100W x 2 P.M.P.O(Peak Music Power Output), which is is perfect for your home theater acoustic sound system. Let’s stay home and enjoy high quality amplified audio.
5 INPUT OPIONAL: The digital amp box supports USB/SD card/FM Radio/ Bluetooth and various external sources RCA(R,L) audio input for tuner, CD player, tape deck and so on.
USB 2.0/SD CARD INPUT: The sound amplifying mixer device features a USB/SD card input to support flash drives or SD card play lossless music file-MP3,APE, FLAC, WAV. Allows you to play your favorite audio files from your computer's media library when you connect it directly to the amp.
EQ CORTROLS - previous, next, play/pause. Rotary knob controls for input, bass, treble, and master volume, come with remote control for distant audio adjustments.
DC 12V and AC110V POWER INPUT: Recommend for home TV audio, computer audio system-game, tower Speaker, garden speaker. Small simple compact design also for car audio system. Let’s enjoy high quality amplified audio everywhere.
TDA7498E 2 Channel Home Stereo Audio Amplifier
【Big Power Output, with SUB Port】This amplifier’s max output power can reach 160W X 160W with high-quality 32V/5A power supply , the package include24v power supply. it also can support SUB Output when it connects with active subwoofer.
【Bluetooth Audio Amplifier Widely Use】This Home Amplifier has RCA and USB port, also support bluetooth 5.0 transmit. so compitable with many device such as: MP3, CD, TV, PC, Echo Dot, iPhone, Android Smartphones, iPad, iPod, Tablets, Turntable, etc. (USB Port is only used U-disk input)
【Home Amplifier Easy to Use】 Perfectly suited for Bookshelf/ Computer/ Desktop/ Theater audio system or other external passvie speakers in your home or office. and this home stereo amplifier is easy to connect to your audio system with no software to install or settings to change
【2 Channel Amplifier High Quality】 Adopt TDA7498E chip to get clear and clarity sound. No Pop, no audible noise or dead silent when nothing is playing through it. Advanced short circuit protection, ssimple compact design, Aluminum shell and knob,Filter more noise
G5 100W Bluetooth 5.0 2 Channel Amplifier Mini Digital Class D Stereo Audio Power Amp Wireless Receiver
Besides standard 3.5mm AUX input, it also supports Bluetooth 5.0 to achieve faster and more stable transmission. Compatible with most home audio devices such iPod, Phone, tablet PC, computers, MP3 players, TV, Echo Dot, CD players and so on.
Adopting TPA3116 chip whose max output power can reach 50W*2 @ 4 ohm, no audible noise and pop even at high power output, default 19V power supply is enough to drive most home bookshelf/ computer/ desktop passive speakers.
Adopting Qualcomm 3003 Bluetooth chip, and 2PCS NE5532 op-amp are used, plug-in type design makes it easy to be replaced by different op amps. Reasonable circuit layout and compact aluminum alloy chassis to ensure better shielding performance and clearer sound.
Simple design without any redundant functions to ensure purer and more natural sound. Mini size with exquisite appearance looks more fashionable, very suitable for home and desktop audio system use.
Prompt and courteous customer service. For any questions, please contact us on Amazon.
Wireless Bluetooth Stereo Amplifier System
180 WATT POWER: THE 2 channel Sunbuck Bluetooth stereo amplifier receiver provides 180W/90W x 2 P.M.P.O(Peak Music Power Output,, RMS [email protected]),which is perfect for your karaoke and home theater acoustic sound system. Let’s stay home and enjoy high quality amplified audio.
6 INPUTS Optional with 2 Mics IN: The digital amp box supports USB/SD card/FM Radio/ Bluetooth/2 1/4 inches microphone IN and various external sources RCA(R, L) audio input for tuner, CD player, tape deck and so on. 2 Mics IN can give you the stronger shock and heavier sense and makes you feel like you're singing in a KTV. （no Mic include）
USB 2.0/SD CARD INPUT: The sound amplifying mixer device features a USB/SD card input to support flash drives or SD cards. Allows you to play your favorite audio files from your computer's media library when you connect it directly to the amp.SD,USB only support MP3, WAV, WMA, APE, PLAC format.
EQ CONTROLS - Previous, next, play/pause. Rotary knob controls for input, bass, treble, and master volume, come with remote control for distant audio adjustments.The remote only controls parts of all function, such as MP3 volume, not for full contro. FM only simple function, which can't fix and save FM stations.
100% Satisfactory Guarantee-Our Wireless Bluetooth Stereo Audio Amplifiers support 6-month warranty, we provide the best customer service. If there is any problem, please free to contact us.
Bluetooth Amplifier Board TPA3116
CHIP: DUAL TPA3116 HIFI Chip with AM Interference Suppression Function, 100W*2 Output Power
WIDE INPUT VOLTAGE RANGE: DC 9V-24V with 5.5 * 2.1mm Interface, Laptop Power Supply Is a Good Choice
BLUETOOTH & AUX INPUT:User Can Directly Connect with Wireless Bluetooth 5.0, or Choose the 3.5MM Headphone (Line in) Way
PROTECTIVE FUNCTION:Over-voltage Protection, Under-voltage Protection, Over-heat Protection, Short-circuit Protection, This means that the Bluetooth amplifier board is not easily damaged
TIP: adequate output power is required when the audio input is sufficient and the power supply voltage/current is sufficient, the relative power will be higher. Different impedance horns will have different output power.In the case of sufficient voltage and current, the larger the impedance horn, the smaller the relative sound power, please pay attention!
298A Wireless Bluetooth 5.0 Stereo Audio Amplifier
Built-in transformer -- Built-in transformer and US plug, the 2 channel Bluetooth 5.0 stereo amplifier receiver provides 300W x 2 Peak 40W+40W RMS Music Power Output, which is is perfect for your karaoke and home theater acoustic sound system.
6 Inputs & Amplifer Dimension -- The digital amp box supports USB/SD card/FM Radio/ Bluetooth/2 1/4 inches microphone IN and various external sources RCA(R,L) audio input for tuner, CD player, tape deck and so on. Amplifier size: 7x5.4x2" / 18x13.8x5.5cm, weight: 2.4pounds/1.1kg. (NOTE: The frequency range of the radio reception is 87.5-108MHz)
USB 2.0/SD card input -- The sound amplifying mixer device features a USB/SD card input to support flash drives or SD card. Allows you to play your favorite audio files from your computer's media library when you connect it directly to the amp.
Multipurpose -- Recommend for home TV audio, computer audio system-game, tower Speaker, garden speaker. Small simple compact design also for car audio system.
1-year Warranty -- We offer 1-year guarantee period. If you have any questions or concerns, please don't hesitate to contact us.
MC900B Amplifier for ATV UTV Car Marine - 500 High Output
Power - 500 Watts Max x 4 @4-Ohms, 94 Watts RMS x 4 @4-Ohms
Specs - Dimensions - 1.75” x 6.6” x 1.75”, Weighs 2.9 lbs.
Bluetooth - You do not need a head unit. Just power up the MC900B and hook up some speakers to it. The included Bluetooth remote control lets you stream your music via your Bluetooth device and use apps like Spotify and Pandora
Auxiliary in - The Bluetooth remote is compatible with the audio output from smartphones as well as MP3 players. Just plug in and start playing
USB Charging - You can charge your USB devices using the USB charging port
Weatherproof - The MC900B has been designed to handle some light weather conditions without giving up on you. It is great for use in ATVs and boats.
Class AB - Class ‘A’ amplifiers have enormous amount of current flowing through its output transistors with no audio signal. Class ‘B’ amplifiers have no current flowing through its outputs with no audio signal
Full Range - With a Full Range amplifier you not only have the option to run your speakers, but also your subwoofers
BOSS Audio Systems provides a powerful 6-year Platinum Online Dealer Warranty so long as the purchase is made through Amazon.com. We strongly encourage professional installation of this product to ensure proper and safe functionality
Nobsound Mini Bluetooth 5.0 Power Amplifier
This is Nobsound's new power amplifier in 2022. Based on our previous product, we enhance its output power and improve its functionality, while still keep its mini size and elegant design.
Despite its mini size(can be hold with one hand), the output power is improved to 100W(50W*2) with the upgraded chip. You will be amazed by its output power compared to its size when you see it.
Supporting AUX/USB/Bluetooth input. You can enjoy your music in different ways. The Bluetooth function is also upgraded to 5.0. Now it is more stable and faster.
We need to mention that with the USB input, music can be played losslessly(Like connecting with a computer. By the way, you don't need to install a driver). You will be surprised by the sound quality.
Prompt and courteous customer service. If you met any troubles or had any questions, please feel free to contact us.
BT10A Bluetooth 5.0 Stereo Audio Amplifier Receiver 2 Channel Class D Mini Hi-Fi Integrated Amp for Home Passive Speakers
Adopt TI TPA3116D2 chip to get clear and clear sound, aluminum shell wireless amplifier makes your home audio speakers more powerful, perfect for your desktop or a small space in your home or office.
Bluetooth 5.0 wireless streaming range up to 50ft(15m), with bass and treble control, mini compact design but practical and powerful.
Advanced circuitry design, built-in speakers protection circuit, no audible noise, dead silent when nothing is playing through it, best for bookshelf/computer/desktop/speakers in your home.
Home Hi-Fi integrated amplifier, exclusively designed for the customers who pursue HiFi sound. The package comes with a power adapter and power cord, you can use it directly.
What You Get: BT10A Amp x1, power supply x1, user manual x1, our worry-free 18-month warranty, and friendly customer service.
Wireless Bluetooth Stereo Power Amplifier - 200W Dual Channel Sound Audio Stereo Receiver w/RCA
200 WATT POWER: The Pyle Dual Channel Stereo Amplifier is perfect for your karaoke and home theater acoustic sound system. It gives you 200W power w/ 100W RMS, accommodates 2 sets of speakers, allow you to enjoy high quality amplified audio
5 INPUTS: This personal digital amp box supports various external sources. Features 1 RCA audio input for tuner, CD player, tape deck, 2 1/4" microphone IN, USB, SD card slot & Bluetooth/FM radio antenna to improve FM sensitivity & bluetooth distance
BLUETOOTH CONNECTIVITY: The sound amplifying mixer device is equipped w/ Bluetooth wireless music streaming. Works w/ today’s latest devices including smart phones, tablets, iPhone and computer w/ hassle-free receiver pairing
EQ CONTROLS: The improved professional compact & powerful mini amp system features crisp, responsive buttons for mode controls & power ON/OFF switch. Equipped with rotary knob controls for microphone volume, bass, treble, and master volume
DISPLAY METER: The compact and integrated indoor AV receiver has a built-in digital LED display showing input mode, track and folder name. FM antenna and remote control are also included in the package for distant audio adjustments
Wireless Bluetooth Karaoke Amplifier Home Car Bus Tours 300 Watts 2 Channel Digital Home Audio PA Receiver System 2 Microphone Input Control
300 Watt Power: The Pyle dual channel PA Amplifier gives your entertainment or PA system a boost; Provides convenient microphone and speaker control with quick connect speaker terminals; supports speakers w/ 4 16 ohm impedance
Bluetooth Compatible: The small professional integrated indoor public address receiver is equipped w/ Bluetooth wireless music streaming; Works w/ today’s latest devices including iphone, iPad, smartphone, computer w/ hassle free receiver pairing
7 Inputs: The public address amp supports MP3 digital audio file playback via USB flash port and SD memory card slot; It also features AUX 3.5 millimeter input, 2 ¼” microphone input jacks, FM radio antenna input and optional 12V DC power input terminals
Siren Alarm Function: The compact desktop audio source system features integrated button activated siren alarm function which can be used for emergency situations and for capturing the crowd’s attention during a presentation or public announcement
EQ Controls: This mini multi source 2 channel compact PA receiver box features front panel button control center and digital LCD Display; Has crisp buttons, independent audio channel rotary volume adjustment and also LED audio output indicator lights
The USB input is only mean to connect to a USB ash drive (thumb drive)