1、Intelligent Chip: With two TPA3251 HiFi chip, the amplifier board supports wide voltage input from 12 to 38V and maximum power 220W x 2 plus 350W. 2、High Pitch and Bass Control: The BT amplifier board allows you to further adjust the high pitch and bass knobs to add layers to the sound and make the bass more impactful. 3、Wide Compatibility: Most DC adapters on the market can meet the requirements of power amplifier board. If you don't have a DC plug, you can directly connect the positive and negative wires to the amplifier board's power socket. 4、Multiple Protection: BT power amplifier module comes with multiple protection mechanisms to ensure safe operation. It includes short circuit protection, under voltage protection, over voltage protection, and wave reduction protection. 5、Versatile Function: The speaker amplifier board module features various functions including APP control, change the BT name, set the BT password, and on off prompt sound. Item Type: BT Amplifier Board BT: 5.1 Power Supply Voltage: 12-38V Support: BT, AUX, USB Applicable Speaker: 355W/2Ω-36V; 250W/4Ω-36V; 195W/4Ω-36V Maximum Output Power: 220W/3Ω-36V; 175W/4Ω-36V; 100W/8Ω-36V Channel: Dual Channel Left and Right Output Power: 220Wx2+350W Funciton: Support APP Control, Change BT Name, Set BT Password, On/off Prompt Sound Protection: Overvoltage, Undervoltage, Overheating, Short Circuit 1 x Amplifier Board 1 x Screwdriver