2014 New Arrival COMEBO Fashionable 360 Degree Rotating Mini Bluetooth Speaker with Sponge and Led Indicator(Black) Charging voltage: DC 5.0V/500mA. Charging time: about 2 hours, music playback time: 4 hours. Frequency Response: 20-18000Hz(3dB). Material: ABS+sponge. Net weight: 98.5g. Gross weight: 153g.