Fan Blade design - inspired by helicopters, air pressure fans move air less distance but pack more force into the space in front of the fan Silence and speed profiles - switch between three curve profiles for your preferred mix of silence and speed Quiet spin - exclusive technology stabilizes the driver that spins the blades, reducing clicks and noisy vibrations Noise absorption - unique rubber inserts with embedded threads absorb fan rattle. Ensure a secure fit on any case Jam protection - protects your fan by automatically stopping the motor if jammed by objects