LAS VEGAS— You can always know who's at your door— even if you're not home.

That's the promise of the Ring, a Wi-Fi-enabled doorbell that allows you to see and speak with everyone who comes to your door from your smartphone, regardless of where you are.

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It's equipped with an HD camera and connects with your home Wi-Fi network. When a visitor rings the bell it sends an alert to your smartphone, and opens a live video stream showing who is at the door and allowing you to talk to them via the microphone.

The speakers have noise cancellation abilities to ensure the best quality. The HD camera has a fish eye lens that is able to capture the area around the door and has infrared LEDs that give it night vision capabilities. All footage captured by the Ring is recorded and can be accessed later.

The RIng app shows you who is at the door even if you aren't home. Image: RIng

Its creators says the Ring is easy to install, even if your doorbell doesn't have existing wiring— it runs off a battery that only needs to be recharged once a year. It can also be connected to your existing doorbell's wiring.

The Ring, the latest smart doorbell from the company that also created the DoorBot, is available for $199.

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Updated January 6, at 2:15 p.m PT to reflect the Ring is already on sale. A previous version of this article stated it's not on sale until January 19, we regret the error.