The Xilence Performance C PWM fan series excels with an extraordinary price-performance ratio and a very good proficiency combined with a lo noise development. The black and red case fans are equipped with PWM function as well as high-quality hydro bearings and are available in 3 different sizes. Technical Details  Optimal performance in every situation  Hydro bearing fan  Airflow-optimized rotor blades Dimensions (L x W x H), (mm): 120 x 120 x 25 Weight incl. fixed cables (kg): 0,112 Connector: 4 PIN / Small 3 PIN Air flow @ 12V (cfm / m3/h): 44.71 Noise level @ 12V (dB(A)): 22 Rated voltage DC (V): 12 Operating voltage DC (V): 6 ~ 13.8 Warranty (Years):2