Features: 1. Support reading MP3 songs in TF card and U disk; 2. Support independent adjustment of treble, bass 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, peak 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/RCA/U-Disk/TF/MIC Power: 30W How to Connect Bluetooth 1. Press "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. Press "MODE" button to switch it to the radio state. 3. Press the "Play" button to search the entire channel and save. 4. Press 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 may vary from batch to batch, but it will 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 x Power supply cable