If you encounter problems before purchase or installation, please contact me in time, I will be happy to solve the problem for you. Product name: case fan Appearance size: 120* 12025mm Bearing type: Hydro Bearing Rated voltage: DC12V (FAN) 5V (LED) Working voltage: DC 6.0-13.8V (FAN) DC4.5-5.3V (LED) Starting voltage: DC 5V (ON/OFF) Operating current: 80mA 20% (FAN) 360mA MAX (LED) Speed: 1200RPM soil 10% Air volume: 33.9CFM (MAX.) Wind pressure: 1. 11mmH20= (MAX.) Noise: 20.15dBA (MAX.) Terminal category: Siamese large 4Pin Pressure-optimised blade design with outstanding quietness of operation.