This audio amplifier module supports MP3, cellphones, computers, TV AUX audio input, pure HIFI audiophile sound quality, treble pure and transparent, gentle and delicate midrange, and bass surging shock. Support BT connection, support connect to the audio system, U disk, and sound card. With volumes adjustment function, support the left and right channel volumes adjustment, master volumes adjustment, and subwoofer volumes adjustment. Cellphone APP control supports both Android and iOS systems, APP visual operation, playing mode, volumes, sound, up and down song control, and playing pause.Features:Support MP3, cellphones, computers, TV AUX audio input, pure HIFI audiophile sound quality, treble pure and transparent, gentle and delicate midrange, bass surging shock.Cellphone APP control supports both Android and iOS systems, APP visual operation, playing mode, volumes, sound, up and down song control, and playing pause.BT connection, support for cell phones, tablets, laptops input, etc.Support the connection of the audio system, you can plays music by connecting the audio.Multiple connection design, support connecting U disk and sound card.With volumes adjustment function, support left and right channel volumes adjustment, master volumes adjustment, and subwoofer volumes adjustment.It adopts a rotary encoder knob which can achieve 360 stepless tuning, smooth and convenient operation.With various protective mechanisms: overvoltage, under-voltage, overheating, direct current detection, and short circuit protections.Specifications:Name: 2.1 Channel BT Audio Amplifier ModuleMaterial: printed circuit boardBT version: 5.1Audio channel: 2.1 channelInput mode: BT + AUX + U disk + USB sound cardPower supplies: DC9-24V/5A or moreAudio output: left and right channel + subwooferFrequency ranges: 20Hz-30KHzVolumes adjustment: high-end encoder knob adjustment, smooth feelOutput power: 50W*2 (left and right channel) + 100W (subwoofer)Satellite box (left and right channel) with speakers: 10W-100W /4-8Subwoofer (subwoofer) matching speakers: 20W-200W /2-8Special features: support APP controlItem size: 82 * 84 * 24mm / 3.23 * 3.31 * 0.94inItem weight: 116g / 4.09ouncePackage size: 123 * 85 * 41mm / 4.84 * 3.35 * 1.61inPackage weight: 161g / 5.68ouncePacking List:1 * BT Audio Amplifier Module1 * Screwdriver