Blink Video Doorbell –

The Blink Video Doorbell lets you see who's at the door, no matter where you are or what you're doing. So, using an app on your smart-phone, you can answer the door, and keep an eye on things, even when you're away. It features a Full HD resolution camera with day or night vision, two-way audio, chime alerts via the app, privacy settings, and long-lasting battery life. You can install it wire-free (just connect it wirelessly to home Wi-Fi), or to your existing doorbell wiring.