According to Reuters, Amazon has acquired the smart video doorbell maker Ring for more than US$ 1 billion. The current Ring doorbells can integrate with Amazon Alexa and it's likely that the company wants to expand in the home security market. This would be Amazon's second acquisition of smart doorbell companies after purchasing Blink last year.
https://www.notebookcheck.net/Rumor-Amazon-acquires-video-doorbell-maker-Ring-for-US-1-billion.286910.0.html