1PIR Human Detection: Built in human sensor (PIR), real time perception of the dynamic in front of the door. When someone appears outside the door, the video is recorded at the first time, and the historical record can be played back at any time through the APP. 2Easy to Use: Simple operation, unlimited design, no wiring, can be installed and used anytime, anywhere to meet monitoring needs. 3Low Power Technology: It can be used effectively for more than 8 months,convenient for energy saving batteries and can be recharged, which is more environmentally friendly and convenient. 4Auto Wake Up: In addition, the doorbell button wakes up, the mobile phone wakes up automatically, records every move in front of the door, and intelligently pushes suspicious videos. 5Mobile Phone Real Time Monitoring: When guests visit, they can make video and voice calls, and make short time video recordings. Even when you are away from home, you can actively wake up monitoring anytime, anywhere, so that you no longer worry.