It has F2.0 large aperture. Aperture: F2.0. Focal Length:12mm.

The Standard Zoom Board Lens with a 16mm focal length is specifically engineered to provide a narrower field of view, allowing objects to appear closer and enhancing definition on finer details right before your lens.

Purchased, never used. Threw box away as my daughter opened it, installed it and then decided not to keep it. Did not use it once. It works perfectly. I don't have the box. Just don't want to keep it as I won't use it.

Quick & Flexible Installation: Installs easily wire-free or connects to existing doorbell wiring.

Set up in minutes — Easily install wire-free or connect Video Doorbell to existing doorbell wiring. You'll also get alerts on your Blink app with each doorbell press. Easily install Blink Video Doorbell wire-free or connect to existing doorbell wiring.

All You Need to Do is Add 1.25" Steel EMT or 1.5" OD Aluminum Tube.

✔ Fast response. ✔ Professional support. ✔ Trusted carriers.

This unit has never been opened and retains the original manufacturer tear-away security seal. Ring Wired Doorbell (2nd Generation). Model : Wired Doorbell (2nd Gen). T ype : Video Doorbell. Color : Speckled Gray.