Blink video doorbell is your personal security guard, always on duty. See who’s at your door with crystal-clear 1080p HD video and talk to visitors through two-way audio from anywhere. Customizable alerts instantly notify you of motion or doorbell presses, while infrared night vision ensures full control even in the dark. It operates wirelessly via Wi-Fi or can be hardwired to your electrical system. Compatible with Alexa—just ask her to open the door. Store recordings in the cloud or on a USB drive (sync module sold separately). Installation takes just minutes, and batteries are included