Dreamgear Concert to Go -
The Concert to Go by i.Sound is an amplified portable speaker case ideal for iPhone, iPod, Smartphones, MP3 players and any audio device with a 3.5mm audio jack.
Place your device securely in the inner mesh pocket and zip the case closed for protection and storage. Take the Concert to Go anywhere to listen to your favorite music in deep, clear, high-quality stereo sound! Requires 3 AAA batteries (not included).Maximum output power of 2-3W. Frequency range of 20HZ - 20KHZ.