Reversed blade that can act as an intake fan with the front view Performance & Silent Balance : Design combines performance and quiet, ideal both as a case fan and for CPU coolers, water-cooling radiator, 57.67CFM, 1.73 mm H2O, 4-pin PWM, max. 29.97 dB(A) Squama particle Patent: Squama particle on the frame, reducing turbulent flow noise increase airflow and pressure efficiency PWM : 4-pin PWM controlled fan speed from 800 to 1500 rpm, with excellent balance of performance and quietness. ARGB Dual Light Loop : The dual light ring equips 18 separately Addressable RGB LEDs can synchronize lighting with motherboard, lighting effects are individually customizable. Shockproof : Anti-vibration rubber pads can prevent scratches and further reduce noise from fan spinning at a higher level.