Nest's Hello video doorbell costs $229 (roughly £165/AU$290 converted).
It has a 1,600x1,200 HD resolution.
Press the doorbell and you get a push alert sent to your phone.
From there, you can view a live video feed of what's happening outside and even communicate with the person through two-way talk.
Nest also offers prerecorded messages such as, "You can leave it," "We'll be right there" and "No one can come to the door."
This video doorbell works with Alexa, Google Assistant and other Nest products.
The Hello can detect general motion, sound and also tell you when it sees a person.
If you pay for the Nest Aware subscription service, you can also create a database of friends, family members or anyone else who regularly comes to your house (dog walker, home care professional, repair person, etc.) and you'll get a custom alert when the camera detects that particular person.