Pyle Home PMS5DB Bass Expanding Rechargeable Dual Mini Speakers for iPod/MP3 (Black) (Pair) Bass expanding rechargeable mini speakers pair for iPod/MP3/computers (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 Plays all iPod/iPhone models and other audio devices with 3.5-mm audio jack - Frequency response 100HZ-20KHZ - Color: Black Perfect replacement for laptop speakers - Battery Charge time:DC 5V 200MAH-300 MAH around 2.5 hours Unique vacuum bass design for surprising volume and bass response - USB 4 hours Fits in your Hand / Pocket for ultimate portability - Plays On Fully Charged 8 hours Built in li-ion rechargeable batteries - Dimensions:2" D x 1.4" W x 2.2"H Plays all iPod/iPhone models and other audio devices with 3.5-mm audio jack - Frequency response 100HZ-20KHZ - Color: Black Perfect replacement for laptop speakers - Battery Charge time:DC 5V 200MAH-300 MAH around 2.5 hours Unique vacuum bass design for surprising volume and bass response - USB 4 hours Fits in your Hand / Pocket for ultimate portability - Plays On Fully Charged 8 hours Built in li-ion rechargeable batteries - Dimensions:2" D x 1.4" W x 2.2"H