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 & materials to deliver unprecedented quiet cooling performance. The upgraded Double Ball Bearing & metal motor hub guarantee high performance up to speeds of 3200rpm. We give you performance you can be confident in, & back it up with our lifetime warranty. Switch your experience into overdrive with the Mobius 120 OC. Lifetime Warranty Premium materials & superior engineering provide incredible fan lifespan – backed by Cooler Master’s lifetime warranty. Ring Blade Design Interconnecting fan blades designed for a reinforced & rigid structure, eliminating vibration for stable & 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 & reinforcement for extended superior fan performance. Double Ball Bearing Double Ball Bearings reduces friction to a minimum for silence & extended lifespan. Premium Anti-vibration Dampers Patented corner mount design dampen vibration & rattling while maintaining chassis stability for silent operation.