Consumers have reflected some of us "Waterproof Cooling Fan" (remote control series) will do a large amount of wind not small, mainly because he used the natural wind or wind sleep function electric fan. Our fans have designed remote control series ordinary wind, natural wind, sleep wind, three functions, air volume ordinary wind is constant, there will be no large do not small; natural wind mainly for large wind nature do not small simulate can periodically from strong to weak control circuit, "Waterproof Cooling Fan" then control the motor speed will not fast do not slow; principle "Waterproof Cooling Fan" sleep with the natural wind, like the wind, but also by the strong rotation weak control circuit to control the motor speed.