thermal sensor       12CM BLACK FAN A 120mm DC axial fan with automatic RPM speed control via a thermal sensor. Improve the airflow in your case with this120mm case fan. long life twin ball bearings are used. Black 12cm case fan Autospeed control with thermal sensor  Application  PC Case fan  Fan dimension  120 x 120 x 25mm  Fan speed  800-2300 R.P.M.  Fan airflow  35.49-105.44 CFM  Fan life expectancy  50000/hrs  Bearing type  Two Ball Bearing  Voltage rating  12V  Noise level  18-38 dB(A)  Product code  AK-174BKT-B 4 case screws 3 to 4-pin adaptor