The board uses the classic circuit of the TPA3110, while using a single power supply with anti-reverse function. Power can be used with adapters and switching power supplies. Most of the resistive container parts are standardized and patched, which is simple and stable. Designed a special interface for the Bluetooth audio receiver module, built-in 5V voltage regulator circuit, It is very easy for DIY bluetooth speaker. Channels: 2 (2.0) Model Number: TPA3110 Bluetooth Amplifier Board Working voltage: DC 8V-26V Speaker impedance: 4-8Ohm Output power: 15W*2 Working current: or equal to 2A Work efficiency: or equal to 90% Bluetooth version: V4.2 colour:green Material: ABS size:Approximately 4 * 6 * 4cm Package Contents: 1 * TPA3110 digital power amplifier board Note:The color of the product's rotating cap is shipped randomly. Random color, don't accept the specified color. Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.