Long range bluetooth headset, up to 15 metres. Features a button that allows you to connect to the virtual assistant. The headband is adjustable to different sizes and the ear pads insulate from outside noise. Lithium polymer battery, dimension 55253.5(mm), battery volume 250mah, 0.925wah, battery weight 5.8g. Working time around 10 hours, charging time 2.5 hours (maximum), standby time 360 hours.