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.