1、Powerful Performance: The BT amplifier board utilizes two TPA3251 chips for its solution, offering stereo 2.1 channel output. This ensures a continuous and high powered operation. With a wide voltage input of DC12‑38V, this amplifier board boasts of a maximum output power of up to 220W x 2+350W. 2、Versatile Input Options: Providing BT input, AUX input, and USB driver input, the amplifier board presents multiple input methods to be compatible with most devices such as smartphones, televisions, and laptops. This makes it highly convenient for connection and usage. 3、High End Sound Customization: If you yearn for more than an amplifier with just a single volume knob, this BT amp board is for you. It allows for further sound refinement with adjustable high frequency and low frequency knobs. This offers a more layered sound quality and a more powerful bass experience. 4、Multiple Guard Mechanisms: The BT amplifier module is designed with safety in mind. It features protective measures against short circuit, overcurrent, overheating, and reverse polarity, ensuring its secure operation. 5、Easy and Efficient Sound Control: This BT amplifier board offers you more. By adjusting the high and low frequency knobs on the amplifier board, you can achieve a layered sound effect and a more impactful bass, providing a better sound experience. Item Type: Amplifier Board Material: PCB + aluminum alloy BT: 5.1 Supply Voltage: 12-38V Support: BT + AUX + USB Number Of Channels: Left and Right Dual Channel Output Power: 220W x 2+350W Special Features: Support APP control, modify the BT name, set the BT password, turn off the opening tone Guard Mechanism: Over voltage, under voltage, overheating, short circuit 1 x Amplifier Board 1 x Screwdriver