GDSTIME 2-Pack Quiet 40mm USB Fans with 3 Speed Control, Mini 5V DC Brushless Computer Case Fan for VR Gear Raspberry Pi Cosplay Helmet Mini PC Aquarium Roku Router Cooling Ventilation
【WIDELY USE】60x60x15mm usb fans, ideal for cooling computer case, inverter, LED lights, humidifier, purifier, aroma diffuser, receiver, raspberry pi, projectors and other DIY projects ventilation
【USB POWERED】35cm/1.15ft USB power cord; 5V USB ports compatible with laptop, power bank and all standard USB outlets; don't need to buy additional cords
【PROTECTIVE GRILL】Both sides of the fan has metal grill; Protect your fingers and fan blades; the center to center hole distance is 1.97 in. Comes with mounting screws
【CONVENIENT】 USB cooling fans are great for small spaces or cramped cabinets, or other poorly ventilated areas; keep your components cool and extend the life
【QUIET COOLING】Dimension: 2.36 x 2.36 x 0.59 in. | Bearings: Hydraulic | Current:0.25 Amp | Power: 1.2 W | Speed: 3500 RPM | Airflow: 18.2 CFM | Noise: 25.8 dBA | Lifespan: 35000 hrs