Fits in any device with a 3.5mm headphone socket Compatible with: MP3 players, PDA, portable gaming systems, phones, and computers Charging is done by connecting speaker to USB port Charge time: 1.5 hours Play time: 4 hours Input: 3.7V 100mAh Maximum Power: 80mW Impedance: 8ohm Frequency: 199Hz-20KHz Type: Cell Phone Speaker Compatible Phone Manufacturer: Universal