Doorbell for e.g. postal registered documents delivering person, for communicating with e.g. older people, at home, has indoor unit allowing occupant to see person ringing doorbell at door, and hear message spoken by person

摘要

#CMT# #/CMT# The doorbell has an external unit comprising a message-button, a camera and a microphone for allowing a person to message and speak to an occupant at home. An indoor unit allows the occupant at home to see the person ringing the doorbell at the door, and hear the message spoken by the person. #CMT#USE : #/CMT# Doorbell for packet delivering and postal registered documents delivering person for communicating with an occupant e.g. older and disabled people, at home. #CMT#ADVANTAGE : #/CMT# The camera and microphone of the doorbell allows the person outside the door to send a message and speak with the older and disabled persons at home, thus avoiding the need of the occupants to reach the door and identify the persons outside the door, and hence enahnacing the comfort of the occupants.