Feature:1. This model comes with 2x5W power amplifier, DC 9V12V, and 12V is recommended.2. You can play music on the memory card and U disk, MP3 music format is supported.3. With digital LED tube, all states are clear at a glance to indicate the operating status and playing time.4. Builtin FM radio and memory function; external audio sources can access the speakers through AUX.5. Can be used in combination of home audio, car audio and professional active audio.Specification:Item Type: Decode BoardMaterial: ABSPower Supply: DC 9V-12VPanel Size: Approx. 91x35x39mm / 3.6x1.4x1.5inHole Size: Approx. 75x27x39mm / 3x1x1.5in.Package List:1 x Decoder Board 2 x Connection Line Note:Please allow 12cm/ 0.40.8in error due to manual measurement.