Zalman ZM-DF12 120mm Premium Daul Fan Impeller Blue LED Case Fan Dimension: 120(L)x 120(W)x27(H)mm / Weight: 135g / Fan Speed: 800 - 1600rpm 10% / Air Flow: Max 63.76 CFM / Voltage: DC 12V / Blue Led Noise: 18 - 33dBA 10% / Air Pressure: Max 1.2mm H0 / Bearing Type: ANB (Advanced Nanopolymer Bearing) / Connector: 3 Pin / Life Span: 500,000 hrs The dual flow created by the dual blade impeller increases the airflow for powerful cooling Performance and delivers the efficient airflow to reduce noise. The specially-designed graphite nanometre high molecular form-bearing has low thermal deformation, contains lubricant for longer service life, and prevents oil loss to reduce friction noise from the shaft. Different from typical system fans, the housing support is designed in the reverse direction so that Friction caused by structure can be removed for more efficient airflow. Provides 3 step rpm speed with a built-in fan controller, it can be fine tuned for superior performance or quietness. Blue LED with auto-blinking function applied for stunning tuning effect. Anti-vibration pad? helps to reduce the vibration efficiently & allows silent operation. Rubber fixed pins also reduce vibrations and tool-less makes it easy to mount.