Functions:
1. When guest insert the room card, the "doorbell" key will show blue LED light, means there's person in the room.
2. Press “ Make Up Room” button of indoor when guest wants to clean the room, the outdoor light with “make up”
marked turns on, and service staff will clean the room, door bell is in working state .
3. Press “ Don’t Disturb” button indoor when guest wants to have a rest or don’t want to be disturbed, the outdoor light with “D N D” marked turns on, the server automatically lock the touch door bell, the door bell will not ring even
there is someone touch the door bell