1[Video Call] When someone rings the doorbell, the bound mobile phone will receive a push notification from the APP and can make a video call with the visitor. 2[Human Body Induction] Can detect the movement changes of the human body within the detection range of the infrared sensor, and take photos and push them to the bound mobile phone client. 3[Shared Doorbell] To share the doorbell to others in the APP, the shared person needs to download the APP to verify the login. 4[Low Battery And Charging] When the battery is low, the doorbell will send a low battery reminder to the bound client, please charge the device. The indicator light is red during charging, and the indicator light is off when charging is complete. 5[Widely Application] This wireless doorbell is widely used in many situations, such as household, offices, hotels, dormitory, etc.