Feature:1. STANDARD CASE FAN: 90mm fan silent USB 5V 0.25A cooling fan for replacing standard computer case fan, gaming PC fan, CPU cooler fan or other electronic device radiator cooler.2. CONTROLLABLE SPEED: The 90mm computer fan allows you to adjust the speed of the computer cooling fan as needed. High, medium and low speed adjustments can increase the maximum speed of the axial fan, you can adjust the fan operation to the level that best suits your environment.3. LONG LIFE, USB POWERED: Dual ball bearings last 50,000 hours. The compact PC fan powers the fan via USB. Simply plug it into an outlet and start the 90mm computer fan.4. APPLICABILITY: Designed to meet the cooling and ventilation needs of a wide range of devices, including computers, game consoles, home appliances, recreational equipment, solar energy equipment, etc., providing effective and quiet cooling, and an ideal replacement USB computer fan for your existing equipment.5. PARAMETERS: 90x90x25mm (3.54 x 3.545 x 0.98 inches.) , Rated Voltage: 5V, Airflow is 95.8 10%CFM, Rated Current is 0.25A, Bearing is Double Ball, Speed is MAXIMUM 2800RPM, Power is 1.5W, Noise is 1828dBA.Specification:Item Type: 90mm PC Case FanMaterial: ABSColor: BlackInput Interface: USBRated Voltage: 5V 0.25AFan Speed: Maximum 2800RPMWind Speed Adjustment: High, Medium, Low Three Wind Speed AdjustmentNoise: 18-28dBACase Fan Size: Approx. 90x90x25mm / 3.54x3.54x0.98in.Package List:1 x 90mm PC Case FanNote:Manual measurement please allow some error.