Switch into Overdrive Perfecting Engineering Cooler Master has expanded on the Mobius Series performance fans with the new flagship model, Mobius 120 OC. The Mobius 120 OC features premium design and materials to deliver unprecedented quiet cooling performance. The upgraded Double Ball Bearing and metal motor hub guarantee high performance up to speeds of 3200rpm. We give you performance you can be confident in, and back it up with our lifetime warranty. Switch your experience into overdrive with the Mobius 120 OC. Ring Blade Design Interconnecting fan blades designed for a reinforced and rigid structure, eliminating vibration for stable and fluid fan operation. Fan Speed Toggle Integrated fan speedd toggle built into the cable let’s you conveniently adjust fan speeds from 1500rpm up to 3200rpm. Metal Motor Hub Motor hub constructed of metal for additional stability and reinforcement for extended superior fan performance. Double Ball Bearing Double Ball Bearings reduces friction to a minimum for silence and extended lifespan. Premium Anti-vibration Dampers Patented corner mount design dampen vibration and rattling while maintaining chassis stability for silent operation.