2 pcs Computer Cooling Fan:1 x 22cm Computer Cooling Fan & 1 x 20cm Computer Cooling Fan Cooling 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 Fan Rated Voltage : DC 12V Operating Voltage : 10.8-13.2VDC Starting Voltage : 7VDC Rated Current : 0.12+/-10%A Input Power : 1.44W Fan Speed : 3000+/-10%RPM Air Flow : 32CFM Noise : 23.85dBA Bearing Type : Hydro Bearing Power: DC 12V Outer material: plastic Color: black & blue Connection: 4-pin PWM connector Size: 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 / 7.9inch Diameter of the mounted hole: 4.5 mm / 0.2inch Hole spacing: 61 x 6 1mm/ 2.4inch x 2.4inch (L x W) Package Contents: 2 x Computer Cooling Fan Only 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.