MTBF: 160,000 hours @ 25C PWM speed control to keep your system cool and silent all the time Smart APS (Adjustable Peak Speed) control providing 3 peak rpm options Patented DFR (Dust Free Rotation) technology instantly blows away dust to prolong lifespan Twister Bearing technology for long lifetime and low noise Detachable fan blades for easy cleaning Isolator-mounts for shockproof and easy installation