Secure keyless entry with your phone. August Smart Lock, 3rd Gen technology – Silver.

Add an August Connect Wi-Fi Bridge (sold separately) to remotely lock/unlock and monitor your door as well to integrate with Alexa, Google Assistant, Airbnb, Home Away Simplisafe and others.
Secure, keyless entry for your smart home. Lock and unlock your door, control keyless access and keep track of who comes and goes, all from your phone. Works with your existing single-cylinder deadbolt
Keep your existing lock and keys. Easily attaches to your existing deadbolt, so everyone can still use their keys.
Send guest keys from anywhere instantly—all from the August app.
Control access for anyone. Grant access for a few weeks, a few hours, a few minutes. It’s up to you.
Be sure you are secure with Door Sense. Only August has Door Sense to tell you the door is completely closed and locked.
Locks automatically as you leave and unlocks when you arrive.
Simple, DIY installation. Install in about 10 minutes with just a screwdriver.