WiFi Enabled Smart Doorbell
The DoorBot is a robotic doorman, It comes for less than $200. The DoorBot has a built-in camera and connects to the internet via WiFi. Hence, you can remotely see and talk to whoever is at your door whether you are just in the next room or half way round the world. It even works at night under low lighting as the DoorBot has an LED light to illuminate the visitor.
Communication is possible via an app on your iOS or Android smartphone or tablet. More than one user can be connected to the DoorBot at a time. All connected users will be notified via a notification message on their device when DoorBot is activated. Last but not least, you can integrate the DoorBot with the Lockitron smartlock so that you can lock/unlock the door remotely as well.
Courtesy : http://www.getdatgadget.com/