[720P Video & 166° Wide Angle] -- 1280*720 resolution with 166 degree viewing angle ensures the clear and stable videos and images. 3 wake-up methods: press the doorbell button/ PIR detection/ mobile phone APP. [APP Control & 2-Way Audio] -- Download mobile APP to connect doorbell with 2.4GHz Wi-Fi, and you can detect and secure your home wherever you are. 2-way audio without noise allows you to talk with your visitors conveniently. [PIR Detection] -- Support PIR motion detection, when someone wandering in front of door, the doorbell will push alarm message to your mobile phone immediately (set the function in APP in advance). [IR Night Vision] -- Day and night mode switch automatically, no matter day or night, image is clearly visible to escort you and your family's safety all the time. IR night vision will turn on when the illuminance is less than 2Lux. [2 Storage Methods] -- Support cloud storage service for convenient use. Or you can use a TF card (not included) to store videos, and it supports auto loop recording if the card is full.