An active power, amplified stereo speaker designed for use with iPod, MP3 players and other portable audio devices. Unique sliding 3.5mm jack allows positioning of the speaker centrally with your audio device. Compatible with iPod nano 1G, 2G, 3G, 4G, iPod 3rd Gen, 4th Gen, 5th Gen, iPod Touch, iPod Touch 2G, iPod Classic, iPhone and iPhone 3G, iPod shuffle, MP3 and CD players. 2 x 0.25 watts RMS. Battery supplied.