[720P Image and Clear Night Vision] The video doorbell adopts full glass lens with HDR and distortion correction, which can present you 720P Full HD video with 166 wide viewing angle. The doorbell camera equipped with infrared sensor and LED will automatically switch the light to ensure a clear image at night, ensuring your 24/7 security. [Lithium battery: 1500MAH, standby time up to 6 months] This HMB1 doorbell camera supports 100% wireless installation, lithium battery: 1500MAH, and provides up to 6 months standby time and is charged on time. (Please fully charge it before using it for the first time). Never worry about opening the doorbell to charge. [3x Digital Zoom Detection and Instant Message Alert] The wireless doorbell is equipped with PIR motion sensors and human detection. When someone walks past your door and triggers the human detection sensor, an instant message alert will be sent to your mobile device, and the detection distance and sensitivity (low/high) can be adjusted according to your preference, so you won't miss anything important. [Auto Snapshot or Video] When the visitor presses the doorbell or triggers the motion detection, the camera will automatically take a snapshot or video and save it to the Micro SD card (SD card needs to be purchased separately). You can view the video on your smartphone at any time. [4.3 inch LCD screen and mini doorbell] 4.3 inch TFT screen, slim design, key operation, hands-free. Outdoor doorbell, built-in infrared sensor and 1200TVL camera, 100o wide angle, night vision, rain, dust and vandalism. It can connect all electronic locks.