This computer case fan will vacuum all the air in the system and blows it out. This is recommended to all systems, and to be mounted on the front or back of the computer case. It will keep you computer cooler, and noiseless. It has maximum reliability and longer life-time usage. This is a standard 8x8 cm edge-to-edge dimension, 80mm. You can put this case fan to be blowing the air out or in. Depending on the way you mount the fan on to the computer case. Features: CPU Cooling Fan Color LED quantity : 4 Rated Power : DC 12V Connector : 4 Pin Connector Fan Speed : 2500RPM Max airflow: 32.5 CFM Noise : 28dBA noise level Bearing : Sleeve Life expectation :30000hours Fan Size : 80mm X 80mm X 25mm Material : Plastic Color : Clear Package Content: 1 x Cooling Fan 80mm (Note : Photo attached is for reference only, it may be slightly varied in items of colour, shape from the actual item delivered from time to time)