�� widely used, not only as an ordinary doorbell, it can be used for special purposes, such as liaison, paging, patient care, emergency notification, etc..
�� Built in stereo speakers, especially suitable for office building, household, factories, tourism and other places, a wide range of uses.
�� Plastic wireless remote control doorbell,Wireless remote control doorbell,Remote control doorbell,Wireless doorbell,Smart doorbell
�� you can give to your family, friends or classmates to use