Infrared Night Vision and Intelligent Motion Detection: 720p HD video with 166 wide angle lens. Which allows you to see clearly in a dark environment at a distance. It provides the protection you need at night and serves as a deterrent against crimes such as theft and vandalism. Supports PIR motion detection when someone hovers over the door and immediately alerts push notifications to mobile phone True wireless and standby time: you don't need wires and cables. Just download the app, then connect it to your doorbell. You can access 720P live HD video from your mobile phone anytime.Low power and super long standby time. With a pair of 2000mAh batteries, the smart doorbell can work for 6-10 months (batteries and memory card are not included) Two-Way Audio and Loop Recording: Two-Way Audio with Noise Cancellation - Allows you to talk to your visitors wherever you are. Loop Recording - It also covers expired video files automatically, making it easier to manage surveillance recordings Multifunctional: meanwhile, you can also capture the photos or video clips at any time and store them on your phone or a TF card instead of cloud storage. There is no access limit to the doorbell with a smart phone, so you can set up your family members to monitor your home Easy to set up: pair with your cell phone and the computer by Wi-Fi connection -Fi, compatible with iOS and Android