This is the video doorbell that lets you see, hear, and speak with visitors from anywhere via your laptop, tablet, or smartphone. When pressed, it displays a live stream on your preferred device with sharp 1080p resolution video and clear audio. It also has built-in motion sensors, infrared night vision, and is compatible with Alexa virtual assistant. A removable, rechargeable battery provides up to six months of power, or it can be hardwired into your existing doorbell circuit. Installs easily with included hardware. Satin Nickel. 5" H x 2 1/2"W x 2 1/2" D.