4. Built-in rechargeable lithium battery of 4000mAh (model 21700) or 2000mAh (model 18650), very long battery life 3. The size of the body is small and portable, and it can be held with one hand. It is very convenient to use indoors or outdoors. 2. Most common turbo fans on the market have 3D printed housings. This product uses injection molded ABS material, which is more durable. Features: 1. It uses a high-speed brushless motor with a diameter of 29mm and a speed of 130,000 RPM, with strong wind power and multiple uses. 5. Support stepless speed regulation, whether it is used to clean keyboard dust or for household cleaning, it is very easy., Weight: 0.7495716908 pounds, Manufacturer: Faeymth