Blink Video Doorbell + Sync Module 2 — Two-way audio, HD video, two-year battery life, motion detection, chime app alerts, Works with Alexa (Black)

Answer your door anytime, anywhere from your smartphone with 1080p HD day and infrared night video and two-way audio.
Experience up to two years of powerful battery life, custom alerts, privacy settings, and more.
Save and share clips — Securely store your footage in the cloud with a free 30-day trial of a Blink Subscription Plan. You can also back it up locally with your included Sync Module 2 and a USB drive (sold separately).
Designed for every home — Connect to your doorbell wiring to sound existing in-home chime. Alternatively, get alerts on your smartphone, or use Blink Mini or Blink Mini 2 (sold separately) as an indoor plug-in chime, without wiring.
Set up yourself in minutes with the two included AA lithium batteries then connect to wifi in the app.
Works with Alexa — Receive alerts and answer with two-way audio. When paired with a Sync Module (or wired with a compatible in-home chime), just ask Alexa to answer the front door.
Includes one Video Doorbell, one Sync Module 2, and mounting kit (including corner mount, screws, and anchors).