Use lubricants like WD-40 or petroleum jelly swiped over a door lock to prevent freezing. Blow compressed air into door locks with the nozzle to force out moisture. Invest in a good car cover.

Keypads: Keypads are the most common way to unlock a smart lock; within a smart lock's app, you can create dozens of keycodes ...

The Lockly Vision Elite is a smart door lock combined with a doorbell camera. The battery-powered deadbolt features a built-in solar panel and a 1080p camera, but you’re better off buying two ...