Measuring 4.6 by 1.5 by 1.3 inches (HWD), the Doorbell Camera Pro is just a hair bigger than the original (4.5 by 1.5 by 1.0 inches), but is more streamlined than the Arlo Video Doorbell(5.0 by 1.7 by 1.0 inches). It has a white housing and a glossy black face that contains a doorbell button, a microphone, and the camera. A 65dB speaker is positioned at the bottom of the enclosure. The button is surrounded by an LED ring that glows white normally and will flash red when Vivint's Smart Sentry technology detects someone while a package is present (more on this later). The doorbell uses an HDR camera with a 1,664-by-1,664-pixel video resolution and a 180-degree field of view. It records at 1080p and has a 1:1 aspect ratio so you can view your entire doorstep area rather than just a chest-up view of whomever is at the door. This allows you to see if any packages have been delivered or if anybody is trying to hide out of sight of the camera. A pair of infrared LEDs provide up to 10 feet...
-- pcmag.com