Feature:1. Large Capacity Battery: Built in lithium electronic large capacity battery, 365 days of standby time after one charge, someone rings the doorbell to work, no one sleeps.2. Voice Changing Function: By supporting switching between multiple modes, the APP has a voice changing function. Girls are not afraid of being at home alone. They can change their voices to become uncles, children are at home, someone rings the doorbell, and adults are outside, which can protect the safety of children.3. Large Memory: Supports up to 128GB memory card, as long as the doorbell is pressed, the video will be automatically turned on. Easy to install, can be pasted and punched, simple and convenient.4. With Ding Dong Receiver: Put Ding dong in the room or living room, someone rings the doorbell together. The 90 ultra clear wide angle lens makes your field of view wider.5. Mobile Phone Remote Control: When the visitor presses the doorbell, 2 pictures of the visitor can be captured, and the visitor record can be saved to the cloud storage. The mobile APP can view the past pictures at any time, which is more secure. When someone presses the doorbell, the doorbell will send a push notification to the mobile phone, and the owner can enter the mobile phone video call interface, and the mobile APP can check the situation of the people at the door in real time.Specification:Item Type: WiFi Video Doorbell CameraMaterial: ABSFunction: Video Call, Voice Changing IntercomLens Angle: 90Aperture Size: F2.0Support System: for Android, for IOSBattery Type: Built in 1000mah Lithium Ion Battery.Package List:1 x Doorbell1 x Dingdong Receiver1 x Data Cable1 x Card Removal Needle1 x Backplane1 x Double Sided Sticker1 x User Manual