The board adopts the typical circuit of TPA3110, which adopts single power supply with anti-reverse connection. It is convenient to use universal adapter and switching power supply for power supply. Most of the resistive container parts adopt standardized patch technology, which is simple and stable. Designed a special interface for the Bluetooth audio receiver module, built-in 5V voltage regulator circuit, easy DIY Bluetooth speaker. The output power is 15W X 2 (@16V), and the board can be connected to 8 ohms and 4 ohms.   parameter:Supply voltage: 8-26VDCSupply current: 2A or above recommendedOutput power: 15W X 2 (@16V)