Detailed Product Description:1x Delta TFC1212DE-PWM, 120x38mm-4pin PWM+Tac Sensor, 252.8 cfm Most Powerful in 120x38mm m factor!This fan is the equivalent spec withPFB1212UHE-F00, only with PWM control.PWM fan connector you can let your motherboard keep this fan running at minimal speeds and still have the high end those times when you really need it.Features :Extreme high airflow and static pressure4 wire with PWM ControlSpeed sensor (Tach Out Put)The most powerful in 120x38mm m factor!Note: Please make sure your board can handle the power consume by this fan.Manufacture / DeltaModel / Part NumberTFC1212DE-SP07Size / Dimension120mm x 120mm x 38mmRated Voltage12 VDCRated Current4.0 AmpRated Input Power- WattFan Speed5500 R.P.M. (Revolutions per minute)Maximum Air Flow252.8 CFM (Cubic feet per minute)Noise Level66 dB-AMaximum Air Pressure35.88 mmH2OBearing TypeBallTermination12? with 4 Wire LeadsPower Connector4pinFunction/FeaturesPWM control/Speed Sensor (Tach Out Put)RoHS StatusRoHS CompliantOperating Temperature-Life Expectancy-Data SheetUnit Weight0.66 lb (10.5oz)