【COMPATIBILITY】USB is an easy and high efficient power solution. You can plug into your computer, laptop, portable charger and other devices with USB output. | 【ULTRA-QUIET DESIGN】With low decibel and stable operation, the mini fan with 4 blades made unique cutting process, and 3 balck feet, which makes it ultra-quiet fan, and perfect for the office, home, dorm, study, library, and games room. | 【POWER SAVING DESK FAN】The mini desk fan only consumes 2.5 watt per hour and saves around 95% power than traditional AC fans. Easy on/off switch to control the fan. | 【4 INCH MINI METAL FAN】All metal construction for durability. Aluminum blade design reduces normal fan noise by 40%, head pivots 360 degrees up and down. | 【SERVICE】If you have any questions, please feel free to contact us, we are waiting to offer the best service as we can.