Blink Video Doorbell | 1080p HD video, motion detection alerts, battery or wired, Works with Alexa (Black)

Answer your door no matter where you are from your smartphone with 1080p HD day and infrared night video and two-way audio.
Experience long-lasting battery life, custom alerts, privacy settings, and more.
Get alerts when motion is detected or someone presses Video Doorbell. Connect to existing doorbell wiring or pair with a Sync Module (sold separately) to engage live view and two-way audio on demand.
Choose to save and share clips in the cloud with a free 30-day trial of the Blink Subscription Plan or locally with the Sync Module 2 and USB drive (each sold separately).
Designed for every home, go wire-free or connect to doorbell wiring to also sound your existing in-home chime. Without wiring, you can use your Blink Mini camera (sold separately) as an indoor plug-in chime.
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 wired or paired with a Sync Module, just ask Alexa to answer the front door.
Includes one Video Doorbell, 2 AA 1.5V Lithium Batteries, 4 Screws, 1 Case Opening Tool. Does not include Sync Module 2 which can be found in all Systems above (recommended for optimal use while on battery).