The plate adopts the TPA3110 PBTL typical circuit, the use of single power meter, very convenient and can use a universal adapter and switching power supply for power supply, its resistance container parts using standardized SMT process, most simple and stable.Interface, bluetooth audio receiver module design with built-in 5 v voltage regulator circuit, can easily DIY bluetooth speakers.The output power of 30 w X 2 (@ 16 v), the board can pick up 8 o, 4 the horn. Parameters:The power supply voltage: 8-25 VDCSupply current: recommended 2 a, or aboveOutput power: 30 w X 2 (@ 16 v)