Nest Hello can tell the difference between a person and a thing, then alert you. Even if a visitor doesn’t ring the bell. With Nest Aware, it can also let you know if it spots a stranger or someone you know. And now, Nest Hello can even send an alert when it spots a package delivery or pickup. There’s no need to monitor your Nest app.
 
instant alerts
Nest Hello can send an alert to your smart device, either when someone presses the doorbell or when it detects a person, motion or sound. And it includes a picture so you can see who's there straight away. It's also compatible with Google Home smart speakers so they can announce when someone's at the door.
HD video quality, day & night.
 
Technical features:
Dimensions
Height: 4.6 inches (11.7 cm)
Width: 1.7 inches (4.3 cm)
Depth: 1.0 inches (2.6 cm)
Weight 4.28 oz (122 g)
Power requirements
16V AC–24V AC; requires a 10VA transformer and wired doorbell
Camera: 1/3-inch, 3-megapixel (2K) color sensor, 8x digital zoom
Video: HD UXGA 1600 x 1200, up to 30 frames/sec, H.264 encoding, HDR
Field of View: 160° diagonal
Audio: High-quality speaker and microphone
Lights: RGB light ring and status light
Sensors: Ambient light
Night Vision: 850 nm infrared LEDs
Operating Temperature: 5° to 104°F (–15° to 40°C)
Weather resistance: IPx4 rating
Security: 128-bit AES with TLS/SSL
Wireless: 
802.11a/b/g/n/ac (2.4GHz/5GHz) 2x2 MIMO Wi-Fi; WEP, WPA, WPA2 encryption supported
802.15.4 (2.4GHz)
Bluetooth Low Energy
 
Equipped with 1600 x 1200 HD vision, HDR and Night Vision, Nest Hello provides bright and crisp images, right around the clock. And with a 160° field of view and 4:3 aspect, you can see the person head to toe, or parcels on the ground.
HD talk & listen
By using the Nest app you can hear your visitors and have a crystal-clear conversation. Or choose from a selection of pre-recorded responses from within the app.