Tri-Mini Portable Speakers for iPod, MP3, and CD Players Special designed for iPod nano/Mini/Shuffle Compatibility: iPod Mini, iPod nano, and all MP3 players & CD players with 3.5 headset jack. Dimensions : 150mm (H), Diameter 40mm (W) (Approx 6" tall x 1 1/2" wide) Speaker is operated by 2 x AAA batteries for up to 10 hours of play time (batteries not included). 3.5mm jack (one extension audio cable is included for other MP3 Players)