**Upgrade your front door.** Upgrade your front door with Video Doorbell 4. Enjoy enhanced dual-band wifi and colour video previews to get the whole picture. **A few seconds, all the difference.** Start recording before you even receive a motion notification with Colour Pre-Roll video previews. With up to 4 extra seconds of colour video, you’ll know what happened before your package was delivered, or other motion was detected. **Never miss a visitor.** Get real-time notifications whenever a visitor presses your doorbell or triggers the built-in motion sensors so you\'ll know what is happening at your front door, wherever you are.