The last time we heard from Lockitron the company was trying to sell a $300 smart deadbolt lock that you could open with NFC. This time Lockitron is taking a different, less expensive approach. The new device is mounted on top of your existing deadbolt, allowing you to control it without buying and installing a whole new lock. The product isn't quite ready to ship, but the company has a handy video demo ready to go.
The box is fairly easy to install on your door, and it runs on AA batteries that last for about a year. Inside are Bluetooth and Wi-Fi modules that are used to manage the lock remotely.