... hotel switch1: Size:86*86mm2: Suit for 110V/220V,12V/5V.3: It can show:Waiting,D. ... 3. The guests press the button” please clean" switch, touch screen's "Please clear the" sign backlight ... the visitors, they can press the "Please wait" switch, or press "Please wait" button, the sign " ... touch-key achieve switch control. The standard pattern, clear and readily understood, and the light can be directed ...