Versatile Cooling Solution: 50mm USB fan is for 3D printers, humidifiers,aromatherapy, small squirrel cage , From electronics and personal use to small computer components, vivariums, and even RV refrigerators Small but Mighty: Squirrel cage fan with a compact and lightweight design, this micro 50mm blower fan is perfect for DIY cooling and tight spaces. Such as cool helmet Usb Fan Controller: Centrifugal fan simply plug into any standard USB port and start cooling. Compatible with phone chargers, laptops, and power banks Quick and Simple Installation: 5015 blower fan is easy to install with a size of 50mm L x 50mm W x 15mm H and mounting spacing of 2.24 in Powerful Performance: Rated Voltage: 5V Bearing:Sleeve Current:0.12A Power:0.5W Airflow:2.91 CFM Static Pressure:0.45 In H2O Speed: 3500RPM Noise: 25.7 dBA Lifespan: 35,000 hrs