Nest Hello is a video doorbell. Know who is knocking on your door. Available early 2018.
Soliom is the World’s first solar-powered wireless video doorbell ☀️🔔
Fully self-sustainable with integrated Solar Panel;
1080p full HD live video streaming;
IP65 grade of Weatherproof;
Day and night 24/7 guardian;
2-Way Talk；1-way video;
One-step installation process;
Day and night mode switch
Vivint's Doorbell Camera is a minimalist doorbell and front door camera that allows for 2-way talk with visitors via Vivint's smartphone app. More useful than a regular doorbell, and more subtle than a security camera, it's the best of both worlds.