Alesis TransActive Wireless | Portable 50W Powered Bluetooth Speaker System with up to 50-hour Rechargeable Battery Portable loudspeaker system with integrated rechargeable battery Perfect for street performers, mobile DJ's, public speakers, classrooms and more Built-in Bluetooth capability lets you stream backing tracks or playlists from your docked, hand-held or pocketed mobile device High-quality microphone stereo RCA and 1/4-inch inputs accomodate any audio source Dead-simple portability: Integrated telescoping handle with wheels