Features: Hydraulic bearings. Long-term use guarantees greater oil storage, longer life, and at the same for time reduces shaft disturbance, and supports PWM speed regulation with a wider range of precise adjustment. Vibration damping, low noise, quiet and efficient. Eight large-area rubber shock absorbers are distributed to help smooth operation and reduce vibration and additional wear. Specifications: Specifications: Item Type: Cooling Fan Material: plastic Model: LF-120 Symphony temperature control Speed: 600-1500rpm (10%) Air flow rate: 19.6-53CFM Noise level: 17.5-31.2dBA Voltage: DC12V Current: 0.35A (MAX) Power: 4.2(for W) Wind pressure: 0.21-1.3mmH2O MTTF: 30000 hours: @25 Bearing form: Hydraulic bearing Interface: 1x4PIN PWM temperature control speed regulation+1x5V 3PIN ARGB Weight: 155g Fan Size: 120(L)x120(for W)x25(H)mm Quantity: 1 Set Note: Note: Transition: 1cm=10mm=0.39inch Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1 Set x Cooling Fan