Main Features: 1. Support reading MP3 music in U disk and TF small memory card;2. Built-in Bluetooth receiving function, can receive Bluetooth music from mobile phones;3. For 12V battery, can be with DC15V charger, (suggest 15V/2A)4. With AUX IN external audio input function, can be connected to the computer to play;5. The panel has a microphone, which can be used to sing.Using word power amplifier, rated power 40Wx2(80W)DescriptionNOTE: (VERY IMPORTANT)1.In normal use, It needs to be connected to the battery, otherwise the board will not work normally.2.The 12V battery is not include, and power adapter is not include.size: 22 x 8.8CMMaterial: plasticcolour: blackPackage Contents:1 x Bluetooth Amplifier Board1 x Remote ControlOnly 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.