Soft silicone integrated anti- reduces minor vibrations and is effectively compatible Flow acceleration channel High efficiency to reduce wind noise,The flow acceleration channel on one side draws in air.Airflow in the outer blade area of the key SCD suppresses PWM switching noise, working quietly every day,Support fully automatic,PWM speed control,IC integration smooth.Switching Direction Drive (SCD) Technology The fans are known for their high quality and outstanding performance. The MTBF of -A8 is over 150,000 hours. Mounting hole spacing:71,5x71,5 mm Connector:4-Pin PWM Cable length:20cm+30cm (standard) :SSO2 Blade design:A series traffic acceleration channel Speed (+/- 10%):2200 RPM L.A. lower speed (+/-10%):1750 RPM Lower speed limit (PWM, +/-20%):450 RPM L.A. Downdraft43,9 m³/h Input power upper limit:0.96 W Input current upper limit:0,08 A Voltage:12 V Colour:As Shown Material:plastic Due to different batches, there may be differences in product appearance and printed text, which not affect use Package Contents: 1 * CPU Cooler Fan Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.