You will not be disturbed when you work due to its low noise. With strong wind, it can reduce equipment working environment temperature and prolong the service life of equipment. Made of high-quality ABS material, it is durable to use. The length of the product is 8cm, the width is 8cm and the height is 1.5cm. It is suitable for wireless router, set top box, computer case, etc. Item Name: USB Cooling Fan Material: ABS Color: Black Voltage: DC 5V Application: Wireless Router, Set Top Box, Computer Case, etc. Features: Strong Wind, Low Noise, Long Service Life Size Details: 8cm x 8cm x 1.5cm/3.15" x 3.15" x 0.59" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x USB Cooling Fan