The temperature sensor will detect the temperature within the computer chassis & it is programmed to maintain the temperature between 32°C & 38°C, meaning this case fan will automatically speed up when the temperature rises. Virtually Silent The patented fan holder in combination with the anti-vibration parts (vibration absorber) ensure that the PC fan is running at a very low noise level, & thus serve as a virtually silent chassis fan option. Excellent Air flow Its unique fan blades boost the volume of air flow by 20% comparing with generic case fans to facilitate efficient ventilation. Quick & Easy Installation Installation is a snap with the four screws which are included in the box. Alternatively, it is compatible with screwless mounting on the chassis (if applicable).