No keys needed with the Yale Assure smart lock

Don't let the fact that it doesn't take keys fool you -- this is a residential lock, and a smart one at that. To be specific, it's the Yale Assure Keyless Bluetooth smart lock, and it wants to help you lose your keys for good. Click through to see more of it.

Like most smart locks, the Assure is noticeably bigger than your standard dumb deadbolt.

Installation is a lot easier than you might expect, and only really requires a screwdriver. Click here for a step-by-step walkthrough.

While we've got that battery compartment open, go ahead and take a look at that port up at the top. That's a slot for a radio module. Yale offers ones that add in Z-Wave or ZigBee compatibility for $50 each -- they'll let you sync the lock up with a platform like Wink or SmartThings. In April, they'll release a $75 module that'll let you use the lock with Apple HomeKit and, unlock it just by asking Siri.

Here's the interior half of the lock with the battery cover back in place.

Once the lock is installed, you'll open up Yale's app and follow the instructions to pair it with your phone.

Once you do, you'll arrive at the app's home screen, where your digital key chain awaits. Rotate your phone or tap the Activate Keys button, and you'll be able to unlock the Assure lock with a single tap.

You can also create scheduled codes or digital keys that only work at certain times. The lock can accept up to 12 codes. As for digital keys, you get five free ones that you can send to friends, family and roommates. After that, they cost $1.99 a piece.

The lock runs on four AA batteries, which come included. The app will send you a notification if they ever start to run low.

If you ignore those notifications and the batteries die, don't worry -- you can hold a 9V battery up to these clever nodes to give the lock just enough juice for you to punch in your code and get inside.

The Yale Assure Keyless Bluetooth Deadbolt is available now, and retails for $200. Check out our full review to see if we think it's a worthwhile smart home upgrade.