The Nest Video Doorbell lets you see what is happening at your door from anywhere, and get alerts about important activity, like a visitor or parcel delivery. Doorbell power: Rechargeable built-in battery, or doorbell wires (8–24 VAC, 10 VA, 50/60Hz transformer). Doorbell chime: Compatible wired mechanical or digital chime, or new compatible chime/Google Nest speaker or display (sold separately). The Nest Doorbell requires a Wi-Fi network, a working broadband internet connection with at least 2 Mbps upload speed (DSL may not qualify), a compatible mobile device, the free Google Home app, and a Google Account. Works with Hey Google features require additional hardware (sold separately), which could include a Google Nest device. Google assistant compatible. App needed for use: Google Home app. Operates over mobile internet. Operates over wi-fi. Requires wireless router for use. Temperature sensor. Controls audio and video devices. Motion detector. Suitable for outdoor. Batteries required 2 x Li-Ion (included). Size H16, W2.4, D4.6cm. In the box: 1 base plate Release tool 2 wall anchors 2 wall screws Wire connector 20 wedge 2 spacers 2 wedge screws 1 charge cable (3 feet) . Manufacturer’s 2 year guarantee. EAN: 193575008530.