Supersonic 4.5-in 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 Line-In 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: 600MA: BL-5B Item Dimensions: 9.00-in x 4.50-in x 2.50-in Item Weight: 1.50-lbs