1.Bell Function; DO NOT DISTURB , MAKE UP,PLEASE WAIT, Room No. indicator. 2.Touch panel, clear LED ... indicator. 3.Apply for hotel Product feature:"DND" " Make up" "bell" ... of LED to show "DND","clean room" and "bell", very personalized, for easy indoor and outdoor communication. ... / hotel room control panel/electrical hotel bell/door chime/door bell