Features: Specially designed for office workers, use all computer monitors, do not block the screen, and can not be clipped off. The small screen fan can be clamped on the computer screen, saving space and not occupying the desktop, allowing you to work cool. Double-headed multi-angle semi-plastic flexible arms can be adjusted freely, and the wind is everywhere, keeping you cool in summer. Two fans, three wind speeds, equivalent to six wind speeds, strong and soft wind can be freely selected according to needs. 35-55 Decibels of low noise operation, just enjoy a quiet lunch break. Specifications: Item Name: Screen Fan Model: H21 Material: ABS Color: White, Blue, Pink(optional) Size: Approx. 19.7x16.5x4.4 for cm/7.75x6.49x1.73 inch Input: USB Charging Wind Speed: 3-gear, 1st gear 2.6m/s, 2nd gear 3.0m/s, 3rd gear 3.9m/s Discharge Power: first gear 2W, second gear 3.3W, third gear 5.2W Noise Decibel: 35-55db Package Includes: 1 Piece Screen Fan note: Please allow 1-2cm errors due to manual measurement,pls make sure that you do not mind before you mind. Due to the difference between different monitors, the picture may not reflect the actual color of the item.