Eufy 1080p HD Battery Video Doorbell is a smart doorbell with chime that stores footage locally. You place the gong in a socket, after which you hear through the app as well as in the house that someone is at the door. In addition, the gong stores camera images locally, after which you view them in the app via an encrypted connection. You can also communicate directly with the person in front of the door via this app. This doorbell works on a rechargeable battery that lasts about 4 months. This makes it easier to install than wired doorbells. The video doorbell battery slim works with Alexa and google assistant. Specifications: 1 Charge: 120 Days. Support Amazon Alexa, Siri and Google Assistant. Human Detection. MicroSD slot on Wi-Fi Doorbell Chime with 16GB memory included. IP65. Full HD. Night Vision up to 10 meter.