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Bluetooth 4.0 receiving amplifier board
Bluetooth chip: CSR8635
Digital Amplifier chip: PAM8403, op amp: NE5532
Supply voltage: 5V (recommended mobile phone charger or power supply) ,mini USB interface
Impedance range: 4 ~ 8 ohm, best for 3W  (10W , also can use it ,may not good effect than 3W)
Use Method: long press on/off key , until the indicator light flashes red and blue alternately, start pairing , your device display "SANWU Audio", Automatic connection, then start play your device audio