1. Strong dust removal, handling a series of debris such as accumulated dust, sand, hair, etc. 2. Built in 21700 lithium battery, with long battery life and up to 4 hours of low-frequency use. 3. 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. Colour: A black Material:ABS Battery capacity: 8000mAh Built in two 21700 batteries Wind speed: 52m/s Working voltage: 7.4V Charging time: 3-4 hours Wind speed gear: infinite speed regulation Maximum power:180W Due to different batches, there may be differences in product appearance and printed text, which not affect use Package Contents: 1 set * Turbo Violent Fan (The styles and colors of accessories vary slightly from batch to batch, which not affect use) Only the above package content, other products are not included. Note: Light reflection 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.