Equipped with wireless BT, radio, memory card / USB audios Supports cards, USB drives, mobile phones, computers, MP3s and other devices.Support wireless connection. USB card interfaces built-in MP3 player. Download your favorite music in USB or card, and enjoy your favorite music. You can the treble and woofers at the same time. Remote Control: Full function. Give you a wonderful in-car entertainment. Durable in use Product Name: Power Amplifier panel Voltage: 3.7V Lithium Battery Charging DC 5V Charging interface Output Power: 30W-120W Amplifier use:car audio system colour: black Material: metal Package Contents: 1 x Car Amplifier Board 1 x remote control(Requires button battery CR2032) 1 x Speaker Cable 1 x FM radio antenna 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.