[Duola] DC 3V 3.7V 5V class AB mono 3W mini amplifier board audio amp module one channel

Power amplifier board with NS8002 beyond the domestic 8002A, B, C, D AB class efficient power amplifier chip carefully debug sound quality perfect, strong power, without any interference, it is fine. Parameter description: PCB size: length 16 × width 10.5 × thickness 2.6mm with protruding part. Installation: SMT patch. Output power: mono 3W. Supply voltage: 2V-5V3. 7V lithium battery can be used. Output impedance: 4-8. Frequency response: 150HZ-20KHZ. Efficiency: 90. Mute control: Yes. Volume adjustment: none. Wiring instructions: This board should be grounded, 3 feet for the power supply negative and ground sharing. 1 foot for the quiet output, and 3 feet to be connected together, when the voltage is 0 when the sound, the voltage is 0.5-5V when the silent, no sound output. Package Included: 1 x Mini Amplifier Board. Power amplifier board with NS8002 beyond the domestic 8002A, B, C, D AB class efficient power amplifier chip carefully debug sound quality perfect, strong power, without a