Features: 1. Support reading MP3 songs in TF card and U disk; 2. Support adjustment of treble, and master volume; 3, Working Voltage: AC 220V or DC 12~24V 4, With AUX Audio input, can be connected to the computer, mobile phone or CD 5, Digital power amplifier, power 400W, can drive 4Ohm 100 magnetic speakers; 6, Dual microphone input, adjustable reverb; built-in Bluetooth wireless Receiver and FM radio. Specification: Type:D30 Bluetooth amplifier Board Input: Bluetooth//U-Disk/TF/MIC Power: 30W How to Connect Bluetooth 1. "MODE" button to switch it to Bluetooth status. 2. Open phone Bluetooth, search the Bluetooth device and connect. 3. You can use it after pairing successfully. How to use Radio ? 1. Hang up the Radio Antenna. 2. "MODE" button to switch it to the radio state. 3. the "Play" button to search the entire channel and save. 4. the previous / next track to switch to use. Plug Type:EU Plug,it applies to Indonesia, Germany, France, Spain, Italy and so on Voltage: AC220V Colour: Black Material: Iron+PCB Note: The printing/appearance from batch to batch, but it not affect the use Package Contents: 1 x Amplifier Board 1 x Remote control(Built-in battery) 1 x Speaker cable 1 x DC Power cable 1 supply cable 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.