Product information: Bluetooth 5.0, supports serial port renaming , supports one-key TWS pairing, supports AUX insertion into TWS pair box without interruption, power on and up, the default volume is the highest. TX, , GND: TTL serial port configuration 9600, N, 8, 1 At 24V6A, the maximum output power is 2x100W, and the power varies with the voltage. Suitable impedance: 4/6/8 ohms. 8-26V power supply, with reverse polarity protection, support notebook power adapter power supply. Boards and devices are -crafted, with sufficient materials and quality. Size: Power amplifier board size: 8.5x5.45CM Fixing hole distance: 7.9x4.85CM type: Amplifier Board color:Black Material:PCB+electronic components Package Contents: 1 x TWS Amplifier Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.