See who's at your door even if you're upstairs or even out of the house. The Ring Wi-Fi Enabled Video Doorbell lets you see who is at the door via your smart device, regardless of your location or proximity to the doorbell itself. 

Activated when the doorbell is rung, as well as by built-in motion sensors, this smart doorbell will even let you talk with your guests before opening the door via a two-way audio system for maximum security. Furthermore, this device is easy to install, comes equipped with high-quality night vision and even a dual powering option, letting you choose between a built-in rechargeable battery or existing doorbell wiring. 

Best Features:

• See who is at your doorstep straight from your smart phone, regardless of whether you are home, at the office or on vacation
• Wi-Fi Capabilities
• Guaranteed lifetime purchase protection so if your doorbell is stolen it will be replaced at no cost to you

Overall, this is a great security device, doorbell and camera for any smart phone. It has received a 4 out of 5 stars on Amazon and 3 out of 5 on CNET, with users claiming that it is a great device, but could be made better with an update due to a few limiting capabilities.