Wireless Doorbell classification

Wireless doorbell from the transmission of content, can be divided into wireless non-visual doorbell and wireless visual doorbell. Wireless non-visual doorbell only transmits voice signals, when the caller rang the doorbell, the master can only hear the sound, but not the visitor's image, the wireless visual doorbell can be both voice call, and can see the visitor's image.

The wireless doorbell is divided from the transmitter's energy, can be divided into active wireless doorbell and wireless doorbell, passive wireless doorbell refers to the transmitter by the visitors according to the energy of the doorbell to convert to electric energy to drive (do not need batteries), and the active wireless doorbell is relying on the internal battery supply.