Specification: Battery capacity: 8000mAh Built in two 21700 batteries Wind speed: 55m/s Working voltage: 7.4V Charging time: 3-4 hours Wind speed gear: infinite speed regulation Electric tuning: 30mAh Size:80*38*142mm/3.2 * 1.5 * 5.6 inche Description 450000 RPM turbofan, brushless motor, powerful. Strong dust removal, handling a series of debris such as accumulated dust, sand, hair, etc. Built in 21700 lithium battery, with long battery life and up to 2 hours of low-frequency use. Infinite speed regulation, easy to operate with one hand, two in one switch speed regulation, increasing volume from small to large, better protecting the motor. Digital display screen: can intuitively see the battery level display and gear display LED lightings: double-sided LED lightings, more convenient for night use lightings 6 Wind speed adjustment: 1-6 wind speed adjustment, 6 long press one key Package Included : 1pcs * Turbo Fan. 3PCS* Nozzle