... touch screen electronic doorplate intelligent interlock instructions for “room number”, “hotel name”, "DND", "Please wait", "clean ... 7, Hotel electronic doorplate, room number plate of star hotel, three-in-one hotel doorplate, room ... electronic doorplate, four-in-one electronic doorplate, three-in-one electronic doorplateStandard &CertificationThe product is ... range: -20 - 80 LED door number plates