Feature: 1. The 4.3-inch super bright TFT LCD screen can display images or videos clearly and smoothly. 720P high-definition camera, high-definition image collection and recording, timely collection and recording, visitor information at a glance. 2. The 170 degree wide-angle lens provides you with a broad field of view, covering almost the entire external environment. When someone knocks on the door, make sure your family is safe before opening the door. It is widely used in villas, apartments, residences, hotels, office buildings, public buildings, etc. 3. Built-in 2 infrared LED lights with night vision function, you can clearly see the facial features of tourists even at night. Provide necessary protection at night to avoid criminal acts such as theft and vandalism. 24-hour security monitoring to protect you and your family throughout the day. 4. Support WIFI connection, mobile APP viewing, two-way voice 5. Easy to install and operate Product name: Door bell Human body sensing detection: support Storage: Maximum support 64G memory card (this link not include TF Card) Take pictures: support taking pictures Video: Support audio video, 20 seconds each time Output format: jpeg/avi Power supply: 3500 mAh battery Adapt to door hole: 14-50mm Adapt to door thickness: 30-120mm Support follow multiple languages, support volume adjustment Can take pictures, record with sound, and display time Colour:Gold Material:ABS&Metal Size: Indoor unit size: 140 x 98 x 20mm Outdoor unit size: 60 x 60mm Package Contents: 1 x Indoor Unit(Including battery) 1 x Outdoor Unit 1 x Metal Bracket 1 x Screw Kit 1 x charging cable 1 x Chinese and English manual Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.