Feature: 1. Adjustable Three Levels: Three levels are adjustable, 1‑3 hours of use time, long lasting battery life, to meet your needs. 2. USB Charging: USB charging, wireless design, compact and portable, you can carry it with you even if you go out for a trip. 3. Automatic Size Adjustment: Silicone snap belt, automatically adjust according to the size of the wrist, bring a fan with you, and follow the coolness. 4. Detachable Strap: The strap is detachable and has a ruler function, so learning and entertainment will not be delayed. 5. Plastic Material: Made of high quality sturdy plastic material, wear resistant and durable, can be used for a long time. Specification: Item Type: Watch Fan Material: ABS Weight: Approx. 93g / 3.3oz Size: Approx. 25.3 x 5cm / 10.0 x 2.0in Battery Type: Lithium Battery (Ship with Inbuilt Battery) Battery Type: Polymeric Substance Lithium Ion Battery Battery Capacity: 350mah Transmission: 3 Level Use Time: 1-3 Hours Charging Time: 2.5 Hours Package List: 1 x Watch Fan (Ship with Inbuilt Battery) 1 x Charging Cable