Fangrui Product Details Features: 1. Support Reading Mp3 Music In U Disk And Tf Card 2. Built-in Bluetooth Receiving Function, Can Receive Bluetooth Music From Mobile Phones; 3. For 7.4v Lithium Battery, Can Be Charged With Dc9v/1-3a Charger; 4. With Aux In External Audio Input Function, Can Be Connected To The Computer To Play; 5. The Panel Has A Wired Jack, Which Can Be Used To Sing Or Sing; Using Word Power Amplifier, Rated Power 15w, Peak 30w; Description: It Must Connect A 7.4v Battery To Open.---this Is Very Important For Power On. The Positive And Negative Poles Of The Battery Must Be Connected According To The This Picture, Otherwise The Board Will Be Burnt. Note: (very Important!!!) Material: Plastic Colour: Black Package Contents: 1 X Bluetooth Amplifier Board 1 X Remote Control(randomly Style. Cannot Be Chosen The Specific Style.) 1 X 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 Differe