Nest Hello Video doorbell always lets you know who is at your door. Replace your current, wired doorbell with this clever Nest doorbell. Download the free Nest app on your smartphone (iOS and Android). The doorbell streams 24/7, allowing you to watch live at any time. Curious which functionalities this doorbell has? HD-quality video recordings, night vision, HDR, 160 degree field of view and motion detection (sound and movement). Do you have a Nest Aware subscription? Then this smart doorbell recognizes family and friends via face recognition and receives a separate update from the app. In addition, you can speak your visit with the push of a button via the built-in microphone and speakers or choose one of the pre-programmed messages. All the footage is stored in the cloud. This contains a secure encryption so that all your material is stored safely.