Nest Doorbell Wired Cotton White Pro SkuConnects to existing wires requires 16 24VAC 10VA min, 50 60Hz 145 diagonal with 3: 4 ratio Know who is at the door talk and listen from anywhere Find out when a package arrives See when animals or vehicles come into view See the full pictue, from head to toe Get a clear view, day or night. Nonstop video only with the wired Nest Doorbell Get continuous video recording for up to 10 days with a Nest Aware subscription. (Sold separately) Google Home App