The Cooler Master GeminII M4 Fan provides amazing cooling performance and features a super low profile design, perfect for systems with limited space. With a unique heat pipe layout containing compact U-shape and C-shape pipes, this CPU cooler efficiently dissipates and manages heat. Case Fan Features Fan Size: 120mm Fan Speeds: 500 - 1,600 RPM Air Flow Rates: 17.4 - 58.4 CFM Acoustic Noise Levels: 8 - 30 dBA Connectors: 4-pin Dimensions: 137mm x 122mm x 59mm