PWM amplifier integrated on motor circuit 4 pin plug for receiving power and PWM signal from motherboard 4 pin socket for CPU cooler or second fan 3 pin plug to send fan RPM signal to motherboard Dimensions: 120 x 120 x 25mm Rated Fan Speed: 400 - 1500 RPM Air Flow: 56.3 CFM / 94.7 m3/h Noise Level: 10.5 dB(A) - 24.5.0 dB(A), 0.05 Sone - 0.6 Sone Power Consumption: 12 V, 0.13 Amp Weight: 166 g Bearing: Fluid Dynamic Bearing Cable Length: 400 mm Warranty: 6 Years