Model: XM27 Material: ABS + Silica Gel Safe Material Battery Capacity: 2400mAh Motor Speed: 3500rpm-5200rpm Battery Voltage: 3.7V Input: 5V Recharging Current: 1.0A Working Current: 0.3A-1.0A Working Wattage: 1.2W-3.8W Packaging Weight:0.4kg Packaging Sizes: LxWxH 8.2cm 20cm 23.7 Portable and Lightweight Cool wind Low Noise Bendable Light Indicator Type-C Interface 70 holes wind outlet Dual Turbine Air Gathering Three wind speed adjustments There are Turbines on both sides that gather wind to double the air It relieve the heat of the mask for you to breathe fresh air Small air conditioning between the neck