Sharper Image SBT1008 Bluetooth Wireless Tailgate Speaker With Built-in Amplifier And Guitar Jack Multiple Uses, Including Guitar Jack And Mic-In With Volume And Echo Controls With Equalizers For Custom Sound Bluetooth-Enabled: Pairs Effortlessly To Other Bluetooth Devices, Compatible With All Phones and Tablets Retractable Handle, Wheels At The Base, Stationary Handle For Easy Transport Long-Lasting Rechargeable Battery (11.2v/2.2a), Charges Through Ac Or Dc With Cable To Charge In The Car (Cable Included) Karaoke Function (Mic Not Included), Powerful 60W Of Output Power, Includes Usb Port And Aux-In Ports