The ES-15TOGO is a portable loudspeaker with a wide range of options. This 15" active loudspeaker features a built-in battery that delivers hours of playback so you can enjoy your favorite music virtually anytime, anywhere. This portable speaker system with built-in wheels and telescoping trolley handle is ideal for music lovers who expect more from their speaker system. ES-15TOGO supports Bluetooth wireless connectivity that gives you ultimate control of your music entertainment. Choose what you want to listen and take full control of the playback session using your Bluetooth compatible smartphone, tablet or MP3 player. It also comes with 2 VHF wireless microphones included with treble, bass and echo controls. Connecting your device to the speaker system over Bluetooth is simple and fast. Once connected, there is nothing between you and your speaker system but endless music. You can also play music on your USB and SD using the integrated MP3 player of ES-15TOGO.