Chuango Smart Video Doorbell is an all-new addition to the Chuango smart home portfolio, powered by Chuango's signature form and function as well as ease of use. When someone presses on the bell button or the built-in motion sensor detects movements, you and your family get an instant notification on your smartphones, enabling you to see and speak with your visitor no matter where you are in the house or in the world, anytime of the day. You can also proactively wake up the Chuango doorbell on demand and see what might be happening on your porch or driveway as you wish. Remote Monitoring With the free iOS or Android app that comes with the Chuango Smart Video Doorbell, you can be anywhere in the house or in the world, and see and talk to your visitor when the doorbell is rung, as if you were on the other side of the door. You can also pull up the app and 170-degree fisheye video anytime you wish, to make sure no one is loitering on your driveway or front porch. Cloud-based Video Recording Optional cloud recording lets you replay, download and share video clips of visitors or motion-triggered events. Powered by Existing DoorChime and Backup Battery The Chuango doorbell operates on AC 8-24V (power regulator module included), which can be powered by your existing door chime to doorbell wires. A built-in backup battery ensures 2 hours of standby time, and sends you a notification in case of power outage. Waterproof Case This transparent acrylic case shields the doorbell from rain and water Specifications Model No. WDB-70 Power Supply AC 8-24V Camera Full HD 1080p Angle of View Horizontal 170°, Vertical 90° Video Compression H.264 Night Vision Automatic IR-cut filter WiFi 802.11b/g/n/ac with WEP/WPA/WPA2encryption 2.4GHz + 5GHz ERP (dBm) MAX 18 Tampering Protection Yes Operating Condition Temperature: -20~+50°C (4~122°F)Humidity < 95% RH (non-condensing) Dimensions 62 x 36 x 132 mm (L x W x H)