Go Rocker is an ultra-portable lightweight speaker that lets everyone hear the music, without being too big and getting in the way. You can stream music wirelessly from any Bluetooth-enabled device or use its convenient SD card slot to play your tunes from an SD card. There's also a handy USB port to play music from a thumb drive and for a 1/8" (3.5mm) Aux In jack for non-Bluetooth devices. Don't let Go Rocker's small size fool you: It's got a real stereo amplifier (2 x 5 watts) driving two full-range speakers for big sound you won't believe comes out of such a small unit. With a long-lasting rechargeable battery and a built-in mic for hands-free call answering, Go Rocker is the small speaker that delivers big-time on great sound, easy portability and super convenience!