Features: 1.Support Multiple Users: WIFI video door bell supports one main account and multiple shared users. You can also add multiple cameras to the same account. It supports 2.4GHz WIFI and can be up and running in a few minutes. 2.Voice Changing Function: HD video door bell has a voice changing function. When there are no adults at home, children can use the voice changing function to communicate and effectively protect themselves. 3.Night Vision: Smart video doorbell has night vision function, and the 850nm infrared fill light extends the viewing distance to 4 feet in the dark, without light pollution. Day and night vision will automatically switch according to the change of light. 4.Easy To Install: HD WIFI doorbell is cordless design, saving you cable trouble. In just a few minutes, you can install it at the door or anywhere you need it. Use double sided tape (attached to the backboard bracket) to directly adhere to the wall or door. 5.Microphone: Smart video doorbell has built in microphone and speaker, which provides two way call and real time video through noise reduction and rate adaptive technology, and can communicate with visitors in real time through smart phones. Contains multiple doorbell music. 6.Message Notification: WIFI video door bell won't let you miss any visitors. When you ring the doorbell, you will receive an instant push notification. You can see, hear and talk to anyone through your mobile phone, tablet or PC. specification:Item Type: WIFI Video Door Bell Material: ABS Scope Of Application: Home Security Power Consumption: 1W Doorbell Built In Battery: Lithium Battery 1000mAh Frame Rate: 30FPS PackageList: 1 x Video Door Bell 1 x Dingdong Machine 1 x Charging Line 1 x Hook And Loop Fasteners 1 x Instructions