I tried to install it, but my house's switch was a 2-wire type, so I couldn't install it. This product (WTA53916WT) is a 3-wire type. I plugged and unplugged the wiring about 3 times for installation, but there are no noticeable scratches. An Advance Switch Plate (for 1 gang) Matte White WTA7101WK is also included. Please confirm compatibility before purchasing. ● Advance Series (WTA53916WT) ● Bathroom, washroom/dressing room (ventilation fan timer switch <12-hour timer) ● AC/DC motor type compatible (also compatible with DC motor type ventilation fans) ● Firefly switch B + 12-hour timer ● Controls the ventilation fan and lighting in the bathroom and washroom/dressing room. Removes moisture from the bathroom and prevents forgetting to turn it off. The ventilation fan timer can be set for approximately 10 seconds to 12 hours (15 steps).