The August MS425 is a small and powerful high quality speaker that will follow you everywhere; connects easily to any Bluetooth enabled device - cell phones, MP3 players, Laptops - giving you a hands free set function as well as track and volume control! No more having to search for your cell phone while listening to music, just answer your call via the speaker! Comes with its own USB cable to charge the device and a 3.5mm jack aux cable for wired use Power supply: DC 5V Built-in Li-ion battery Specifications - Speaker: 4 Ohm, 3 Watt - Frequency Range: 90Hz-20KHz - Sensitivity: 80dB±2dB - SNR: ≥85dB - Distortion: ≤0.3% - Power Input: DC 5V 300mA - Battery: Internal Li-ion 3.7V 600mAh - Charging Time: 3 Hours - Battery Life at Maximum Volume: 5 Hours - Bluetooth Version: Bluetooth 2.0 - Range: Up to 10m (Class II) - Dimensions: 60x60x57mm - Weight: 187g Instruction Manual Languages: English / German / French / Italian / Spanish 12 Month Manufacturers Warranty New product supplied in retail packaging BREAKING IN PERIOD Please use this speaker at Low Volume for the first 30 minutes to calibrate its membrane and ensure optimum performance .