Battery Capacity 650mah Charging Voltage/Current 5.0V/1 A Heating Material Quartz Coil Heating 20s on-demand or 10s draw active Session 10/20 seconds Size 22*38.5*166.5mm(0.87*1.52*6.55inch) Temperature 3levels(285℃/545℉，320℃/608℉，360℃/680℉)