Blink video doorbell with Sync Module v2

No subscription needed, plug in usb key to sync module to store locally.

Two-way audio, HD video, long-lasting battery life, motion detection, chime app alerts, Works with Alexa (White)

Answer your door any time and 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, customised alerts, privacy settings and more.
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 (sold separately).
Designed for every home, go wire free or connect to existing doorbell wiring to also sound your current in-home bell. Without wiring, you can use your Blink Mini camera (sold separately) as an indoor plug-in chime.
Set it up yourself within minutes, with the two included AA lithium batteries, and then connect to Wi-Fi using the app. The newly designed internal battery seal provides IP54 weather resistance rating.
Works with Alexa—access live view, two-way audio, receive motion and chime alerts, arm and disarm your doorbell, and more.
Includes: a Blink Video Doorbell, a Sync Module 2 and mounting kit (including corner mount, screws and fixings).
Does not include box.
https://support.blinkforhome.com/en_US/blink-video-doorbell-setup/setting-up-your-blink-video-doorbell