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Barometric Ball Bearing (BBB) TechnologyThe innovative Barometric Ball Bearing technology provides longer life span while remaining lower noise level.
Removable Sword-Shaped Blades with Triangular Blade TipsThe Cooler Master Excalibur R4-EXBB-20PK-R0 is equipped with nine massive sword-shaped blades which generate outstanding high air pressure with balanced airflow for exceptionally cooling efficiency. Triangular blade tips reduce turbulence at fan edges and decrease wind shear noise while keeping maximum sweeping area. The blades are removable for quick and easy cleaning.
Honeycomb Ventilation Meshed FrameThe honeycomb ventilation meshed frame works as a secondary intake to increase airflow under low fan speed operation, or helps reduce noise by releasing excessive turbulence and vibration when the fan spins at high speed.
Sturdy StructureThe Cooler Master Excalibur R4-EXBB-20PK-R0 features 3-piece frame with metal rim for robust structure.
PWM FunctionThe PWM function automatically adjusts fan speeds according to the CPU temperature for efficient cooling and minimized fan noise, a total performance solution at high and low speed operation.