Storage Method: 2 ways to record the video---free cloud storage and SD Card Storage. The video will be automatically stored in the Cloud firstly and then stored in the card. (SD card is not included)HD Wide-angle Lens: See, hear and speak to anyone at your door with clear 720P/1080P full HD definition in 155 wide-angle lens through the APP which is compatible with iOS, Android.PIR Detection and Smart Night Vision: Detecting the slightest movement in front of the door. Low, midium and high sensitivity for you to choose. Get instant alerts when visitors press your Doorbell or trigger the built-in motion sensors. Equipped with IR sensor and LED lamps, the camera can automatically switch the light to ensure you a crystal view at day or night.Two-way Talk: Low Power Consumption and Truly Wire Free. No wires and cables are required, adopting ultra low power technology, long standby time. Free Indoor Chime. Easy to use indoor chime- just plug into the socket. There are 52 melodies and 4-level adjustable Volume for you to choose. Real-time Two-way Talk Without Noise.