Stay hands-free, without compromising on hearing or being heard clearly. When all is said and done, turn up the volume and have a little fun with your favourite playlist. 10.8 ( h ) x 8.9 ( dia ) ABS & polyester includes printed gift box supports playback from smartphones, tablets or most other Bluetooth compatible audio devices internal, rechargeable lithium-ion battery recharges via USB cable ( included ) built-in microphone supports call pick-up compatible with wireless charging enabled devices to use the wireless charging function, the device being charged must be wireless charging compatible