Usha Helix Pro High Speed 400MM Pedestal Fan (40), Blue High speed performance - 2300 rpm provided 70% more speed than normal speed fan higher air delivery - 30% more air flow than normal speed fans soft touch head tilting mechanism - ratchet type mechanism for soft adjusting tilting angle synchronous motor - synchronous motor for driving smooth and uniform oscillation aerodynamic design - aerodynamically designed abs blades with better air thrust easy oscillation switch - ergonomically placed switch to control fan oscillation overheat protection - auto resettable fuse to safeguard motor during thermal overloading sweep size: 400mm