Mobile Bluetooth speaker. Features: Battery-operated for complete mobility: the battery can be charged using a USB cable (in the package). With the integrated hands-free system making phone calls is very easy. Supports remote function for music control with play/pause/next title/previous title. The speaker also has a microSD card slot for music playback. Specs: Maximum music power: 3 W. Connection: 3.5 mm Jack Socket/Bluetooth. Frequency Range Speaker: 180 - 20000 Hz. Impedance: 4 Ω. Uptime: 6 hours bluetooth, 10 hours Aux. Compatible with: Android/iOS/Windows. Dimensions (W x D x H): 9.2 x 3.2 x 8 cm. Weight: 270 g. Colour: Red.