Delta Electronics EFC0812DB 80x80x15mm Cooling Fan, 48.8 CFM, 3800 RPM, 41 dBA, 0.5 Amp, 4-pin PWM connector 80 x 80 x 15mm, dual ball bearing Rated Voltage: 12VDC, Operating Voltage: 7~12.6VDC, 0.33A, 3.96W 3800 RPM, 48.8 CFM, 1.38m/min., Air Pressure: 0.171 in-H2O (42.6 Pa.), 41 dBA PWM and Speed Sensor, 4 wires, 4 pin PWM connector