1、[2.1 Channel] This Bluetooth 5.1 digital amplifier module features 2.1 channel output with a total output power of 100W+100W+200W, ensuring continuous serial high power working. 2、[TPA3221 Chip] The 2.1 channel bluetooth amplifier board uses two TPA3221 chip, ensuring HiFi sound quality, with a wide input voltage range of DC12 to 30V. 3、[Multiple Inputs] Supports Bluetooth, AUX, and USB driver inputs, the amplifier board is compatible with a wide range of devices such as smartphones, TVs, and laptops. 4、[Treble and Bass Control] By adjusting the treble and bass knobs of the amplifier board, the sound can be made more layered and the bass more amazing. 5、[Safety Design] Bluetooth amplifier board is designed with multiple guard mechanisms including short circuit, over current, overheat, and reverse polarity guard. When overload occurs, the device will report the fault situation to the processor to guard itself from damage. Item Type: Bluetooth Amplifier Board Material: PCB Bluetooth Version: 5.1 Compatible Speaker: Left and right channels, support 3-8Ω, speakers within 100W; Subwoofer, supports 2-8Ω, speakers within 200W Input Method: Bluetooth, AUX, U Disk, Sound Card Guard Mechanism: Input undervoltage, input anti reverse connection, overheat, overcurrent, short circuit guard APP: for Wuzhi 1 x Bluetooth Amplifier Board 1 x Screwdriver 5 x Knob Caps 4 x M2x14 Copper Pillars 8 x M2x3 Screws 4 x M2x3+3 Copper Pillars 1 x Top Cover Plate 1 x Bottom Cover Plate 1 x Adapter 1 x User Manual