MagiDeal 3-Pin/4-Pin 120mm PWM PC Computer Case CPU Cooler Cooling Fan With Red LED Cooling fan for desktop computer case and CPU Cooler. 19 dB-A silent application for CPU cooling. 3Pin 4pin connector , Support PWM speed control, Help push the hot air out of your computer when mounted on the back, or draw in fresh air if you mount it at the front of the case