Fangrui Product Details Fangrui Product Details 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 3.7v Lithium Battery, Can Be Charged With Dc5v/1-2a 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 The Product Is Mono Channel. Note: It Must Connect A 3.7v Lithium Battery To Open.---this Is Very Important For Power On. Type: Amplifier Board Color:black Material:metal Size:194 X 85 X 26mm Package Contents: 1 X 3.7v Bluetooth Amplifier Board(without Power) 1 X Remote Control(with Battery) 1 X Speaker Wires 1 X Radio Antenna Only The Above Package Content, Other Products Are Not Included. Note: Light Shooting 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.