August Smart Lock, 2nd Generation, HomeKit enabled (Silver)

No more fumbling for keys. Control access to your home with Amazon Alexa, Apple HomeKit or your smartphone. Auto-unlocks your door as you approach and automatically locks your door after you enter. No more hiding keys under the mat with virtual keys, and the 24/7 activity log lets you know who opens you door and when. Your exterior door hardware stays the same. August Smart Lock replaces only the the interior of your standard deadbolt. Install yourself in minutes.

Disclaimer
Warranty is only effective for US and Canada customers.

Make sure this fits by entering your model number.
Works with Alexa for voice control (hub required, Alexa device and hub sold separately).
Connect your August smart lock to Alexa to Lock, unlock and check lock status. Alexa can also provide notifications when your batteries are running low so you can proactively replace them, or you can set up smart reorders to make sure you always have replacement batteries when you need them.