Piano-Key Ventilation Fan Control Switch
This is a three - way ventilation fan wall switch with adjustable delay time. It can control one ventilation fan and two lamps. The delay time of the ventilation fan can be accurately set by users through DIP switches. This product prevents the ventilation fan from running ineffectively for a long time when no one is around and is suitable for places such as bathrooms and kitchens. The lamps go out immediately when people leave, and the Ventilation fan turns off automatically after the environment is thoroughly ventilated and deodorized.
