https://www.cnet.com/news/remo-has-three-new-security-cameras-at-ces-2019/

The DoorCam 2 is the second-gen version of the Remo+ DoorCam.  Like the first-gen DoorCam, this model fits over your door -- rather than being mounted to a wall or doorframe. It's powered by three D batteries so you don't have to worry about hardwiring. 

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