Visualizable talking: when someone press the doorbellcellphone that combined to it will receive a notification, and will be able to talk to visitor.
Share doorbell: you can shall your visitor records to other users. other user needs to download app and log in. (supports maximum 9 shares, only 1 can answer the doorbell.)
Low power warning cellphone will receive a notification when device is low power. please change the dry battery in time.