Product selling points: 1. Use high-quality materials, quality guaranteed 2. Fever Mike front board, reverberation beauty, 3D adjustment 3. Support wired capacitive Mike and wireless Mike receiver, more convenient to use and 4. Excellent sound effect, Give you an excellent experience 5. Wide range of applications parameters: voltage input: 8-26VDC, not AC input background music input interface: XH2.54-3P, 3P shielded wire is given, one end of the 30cm long is XH2.54 connector, and the other end is stripped of tinned . if you need to plug in a mobile phone or other 3.5mm audio output interface, you need to bring your own 3.5mm audio head to XH2.54-3P audio cable. Reverb output interface: XH2.54-3P, 3P shielded wire is given, the wire length is 30cm, one end is XH2.54 connector, and the other end is stripped and tinned. The output is connected to the audio input terminal of the power amplifier module. If you need to XH2.54-3P to 3.5mm audio head cable or XH2.54-3P double head cable, you need to purchase it yourself. Mike interface: double 6.35mm Mike interface potentiometer: 10K single potentiometer, 6mm plum handle Color: As shown Material: Electronic Component Package Contents: 1X AMP Fever Karaoke Reverberation Board Kit 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.