Features Mobile Video Call: When someone presses the door bell, push a notification to the phone, and the owner can enter the mobile video chat interface, supporting sharing with up to 10 members simultaneously. Shoot and Storage: When visitors press the door bell, they can take photos of the visitors and save the records to the cloud, and they can view past pictures at any time through the mobile APP, which is safe and reliable. Variable Voice: The intelligent WiFi door bell supports variable voice intercom function, making it easy to deal with unfamiliar visitors, supports 2 voice modes of original voice and uncle voice. Night Vision Lamp: The remote monitoring door bell has high definition adaptive night vision function, and uses 850N night vision lamp, which can automatically switch between day and night modes. Built in Battery: This device has built in 800mAh lithium ion battery and an ultra long standby time of 365 days, without the need for disassembly and cycling charging, making it easy to use anytime, anywhere. Specification: Item Type: WiFi Door Bell Material: ABS Lens Angle: About 60 Degree Pickup Distance: Approx. 3 meter / 9.8ft Night Vision Lamp: 850N Night Vision Lamp Ringtones: 38 Battery: 1 x 800mAh Lithium Battery (built in battery) Package List:1 x Wireless Monitor1 x Door Bell Machine1 x Data Cable2 x Screws2 x Expansion Tubes1 x User Manual Package List 1 x Wireless Monitor 1 x Door Bell Machine 1 x Data Cable 2 x Screws 2 x Expansion Tubes 1 x User Manual