This is a wireless bluetooth receiver amplifier.

1.After power is turned on, the product automatically goes into pairing mode.You can then view the device by scanning for available devices.
2.Power: DC 12V power supply through 2.1mm DC Jack
3.Audio input: Accepts multiple bluetooth standards - Bluetooth stereo inputs, CSR8635 Bluetooth chip, Bluetooth V4.0, has high software compatibility.
4.Output Impedance: 8 ohms Best (it can also drive 4,6,8,16 ohm speakers).
5.Output Power: Add pre-5532 output
6.DIP switches can be more easily adjusted directly after class amplifier gain