Noiseblocker NB-Multiframe M12-P 120mmx25mm Ultra Silent PWM Fan - 1000-2000 RPM - 12-29 dBA NB-Mulitframe Technology The high tech multipart chassis has integrated vibration absorbers at each corner, making the fan supported directly by rubber. Even the fan's main framework uses anti-vibration glass-fiber reinforcement. Extremely Low Starting Voltage TV Certified Noise Level The ultra quiet, fans are practically silent and TV confirms the listed decibel rating. Robust Design The fan features overload protection, restart function, fail safe design - Noiseblocker is so confident they gave the fan a 6 year warranty. Extremely Quiet Bearings The near noiseless and extremely long-lived NB-NanoSLI bearing is the heart of the fan and will provide you years of service.