GSI Super Quality Mini Hamburger Capsule Speaker - for iPod/MP3/MP4/Computer/Laptop/Notebook/Audio/Gaming-Devices/PDA - Black Plays all iPod/iPhone models and other audio devices with 3.5-mm audio jack Perfect replacement for laptop speakers Unique vacuum bass design for surprising volume and bass response Fits in your Hand / Pocket for ultimate portability Battery Charge time:DC 5V 200MAH-300 MAH around 2.5 hours; USB 4hours