Product IntroductionAudio input: Bluetooth receptionPower supply voltage: 8~26VDC(direct current) polarity reverse protectionPower amplifier chip TPA3118 stereo power 2X30WApplicable speaker impedance: 4, 6, 8 ohmsAUX Input: 3.5 headphone holderAfter power on, it will automatically enter the pairing mode. Turn on Bluetooth on your mobile phone or computer and search for the device name: XH-M314 (manufacturers can provide customized device name for batch requirements). CIick the pairing to play and use.Product ParametersProduct name: Digital Bluetooth power amplifier board