1. Three-speed adjustable wind, quad-core wind, high-intensity suction. Quickly remove carbon dioxide, moisture and heat from the mask. Keep your face . Lightweight and compact. Portable mini design. With for easy fit and ventilation into the mask.2. It can be charged via USB cable. This circulation fan with -in lithium battery is energy-saving and environmentally friendly. High efficiency and low noise operation.3. Charging protection cover. The silicone charging case is soft and has excellent high and low temperature resistance. It can prevent water from accidentally splashing into the USB port and protect the USB port from damage.4. Type-C charging port. Type-C connectors are smaller than standard USB connectors, saving space. With up to 10,000 of mating life and strength blind mating structure design.charging indicator. The user is more aware of the of the product, the red light is always on when charging, and the indicator light is off when the charging is complete.5. Made of durable hard plastic. Can be placed in office, living room and bedroom. Perfect for Valentine's Day, Birthday, Christmas and .Product name: purification mask fanItem model number: K1Charging time: 1 hourBattery capacity: 270mAhBattery voltage: 3.7VRated : 0.5WInput current/voltage: DC5V/85mAOperating Voltage:First : 3.5V, current 115mA, speed 5500Second : 4.1V, current 137mA, speed 67003rd : 4.1V, current low speed 3.3mA, high current current 147mA, speed 6700operating hours:1st : 2 hours 36-44 minutesSecond : 2 hours 06 minutes - 11 minutesThird : 3 hours 40-47 minutesTraditional mask fans:1. is not filtered by the mask will be pumped into the intake hood;2. Reduce the filtering effect of the mask, and there are potential safety hazards.K1 purification mask fan:1. Filter the outside through the mask and inhale it into the intake hood.2. The breathing exhaust gas and moisture in the mask are discharged out of the mask to achieve the effect of ventilation and heat dissipation.3. One hour battery life than traditional mask fans.4. The K1 purification mask fan is lighter than the traditional fan cover.Colour:blackMaterial:ABS+PP Size:16 x 28 x 64mmPackage Contents:1 x fan1 x Type-c data cable1 x Chinese and English manualOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.