Supersonic 4.2-in-Watt Indoor Personal Speaker

High Quality Performance Speaker Enjoy Listening to Your Music Anywhere You Go USB Input Mini SD Card Slot FM Radio 3.5mm Aux Input Allows You to Play All Your External Media Players Output Power: 3.7V = 1000MA SNR: =85db Frequency Response: 100Hz 18Kz Horn Size: 40mm/2 x 4 ohm Input Power: DC5V 500mA Power Supply: Built-in Lithium Rechargeable Battery Battery Capacity: 600mAh, BL-5C Item Dimensions: 7.87-in x 6.00-in x 4.00-in Item Weight: 2.00-lbs