1.[TPA3251 HIFI CHIP]The TPA3251 Chip Solution: Stereo 2.1channel Output to Ensure Continuous Serial High-power Operation, Wide Voltage Input DC: 12-38V,This power amplifier board uses two TPA3251 high-fidelity maximum output power up to 220W2+350W. 2.[MULTIPLE INPUT METHOD]The S350HS has multiple input methods such as Bluetooth input, AUX input, and USB drive input. The vast majority of devices can be used, such as mobile phones, televisions, laptops, etc., making it easy to connect and use. 3.[TREBLE & BASS CONTROL]If you are tired of an amplifier with only one volume knob, then you feel right, because you have further requirements for audio. By adjusting the high and low frequency knobs of the S350HS power amplifier board, you can make the sound more layered and make the bass more shocking. 4.[PROTECTION FUNCTION]S350HS Bluetooth power amplifier board has multiple protection mechanisms to ensure its operation. It has short-circuit protection, over-current, over-heat, and anti-reverse protection. When an overload occurs, the device reports the fault condition to the processor to protect itself from damage