Pc exhaustSmall and powerful, for DIY inflatable ,to cool amplifier, Car seats, computer case, Hard drive slots electronic motherboards, server room and other audio video electronics. Computer Case CoolingGreat for computer build that require direct cooling on components that don't receive enough airflow.Will fit in spots intended for a normal 120mm case fans , pulls and pushes from one side into an optimal direction. Dual Ball BearingHigh quality , suitable for long-term work. Long life: 50,000 Hours. Pc case cpu gpu high cfm computer centrifugal fan 12V pwm cooler fans for gaming pc car exhaust Cooling. Support Intelligent Speed Regulation4Pin PWM Fan , Red: + ; Black: - ; Yellow (FG): sensor signal feedback; Blue(PWM)Fan speed control pin, the fan speed is controlled by the voltage of this pin. Dimension120 x 120 x 32 mm ( 4.72 x 4.72 x 1.26 in. ) Rated Voltage:12V Airflow: 36 ±10%CFM Power: 8W Speed: 30