Integrated Digital Karaoke Reverberator with Bluetooth 5.0 AUX Microphone for clearer sound and impressive reverb effects, designed with a Coaxial Decoder Audio Amplifier Mixer Board for Cars. DAM H1 presents an advanced Bluetooth TWS Digital Microphone Preamplifier Board loaded with key features for superior performance High fidelity: When used as an audio amplifier, the tone is warm and the fidelity is high. It has the characteristics of small size, high efficiency, high power and small heat. Wide range of uses: suitable for high quality and professional audio equipment, instruments, control circuits and telephone channel amplifiers. USB decoding format: MP3, WAV, FLAC, APE, with a bit rate of less than 1500kbps Microphone interface: dual 6.35mm microphone interface Power interface: DC5.5-2.1 female socket, or wiring terminal, choose either Audio output interface: 3.5MM headphone stand, or XH2.54-3P socket, choose either Working modes: BT, AUX, USB drive/sound card Indicator light status: The blue light flashes slowly in USB and AUX modes, remains on continuously after a successful BT connection, and flashes excessively slowly when there is no connection. Start TWS, red light flashing to search for pairing, red light constantly on TWS left channel, red light slowly flashing TWS right channel. Mode priority: Inserting USB or AUX can preemptively interrupt BT, and the mode can be memorized after power failure. BT cannot be found in USB or AUX mode. Features: Support Bluetooth and USB decoding Dual microphone interface digital reverb Dynamic anti-howling virtual bass TWS pairing box Wide voltage 8-36VDC power supply name: DAM H1 Amplifier Board With shell version Note: The shell needs to be assembled by yourself; the delivery does not include power supply, USB cable and audio cable; it does not support WUZHI AUDIO APP. Material: ABS+metal colour: Black Package Contents: 1 x Microphone Preamplifier Board 1 x Screwdriver Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.