2 pcs Computer Cooling Fan:1 x 22cm Computer Cooling Fan & 1 x 20cm Computer Cooling FanCooling fan for desktop computer case and CPU Cooler, keeps computer working well.4pin connector , Support PWM speed controll,Help push the hot air out of your computer when mounted on the back or draw in fresh air if you mount it at the front of the case.Product Name : Computer Cooling FanRated Voltage : DC 12VOperating Voltage : 10.8-13.2VDCStarting Voltage : 7VDCRated Current : 0.12+/-10%AInput Power : 1.44WFan Speed : 3000+/-10%RPMAir Flow : 32CFMNoise : 23.85dBABearing Type : Hydro BearingPower: DC 12VOuter material: plasticColor: black & blueConnection: 4-pin PWM connectorSize: 70 x 70 x 15 mm / 2.8inch x 2.8inch x 0.6inch (L x W x H)Cable length: 22 cm / 8.7inch+20cm / 7.9inchDiameter of the mounted hole: 4.5 mm / 0.2inchHole spacing: 61 x 6 1mm/ 2.4inch x 2.4inch (L x W)Package Contents: 2 x Computer Cooling FanOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.