Extended battery life – 2 year battery life on two AA lithium batteries with a combination of two-way talk, live view, and motion recording. Double the usage of the XT on a single set of batteries when recording video.2-way audio – Talk to visitors through the Blink app on your smartphone or tablet.Customizable motion detection – Use activity zones to choose where motion is detected so you receive the alerts that matter.Free cloud storage – Keep hundreds of clips stored up to a year with no monthly fees or service contract required.Works with Alexa – View live streams, motion clips, or arm and disarm your system through select Alexa-enabled devices.Day and night coverage – Record and view in up to 1080p HD video during the day and with infrared HD night vision after dark.Use indoors/outdoors – Blink XT2 stands up to the elements. Place or mount it inside or outside for whole home security.Easy setup – No tools, wiring, or professional installation required.