3. Built in 18650/2000X2 battery capacity, with long battery life and up to 4 hours of low-frequency use. 2. Strong dust removal, handling a series of debris such as accumulated dust, sand, hair, etc. 1.110000 RPM turbofan, brushless motor, powerful. 4. Infinite speed regulation, easy to operate with one hand, two in one switch speed regulation, increasing air volume from small to large, better protecting the motor.