The Goji Smart Lock is a sophisticated smart deadbolt replacement operated by smartphones using Bluetooth and remotely via Goji’s servers and your local WiFi. It also detects special Bluetooth key fobs and opens the lock and has backup mechanical keys. You can send virtual keys to anyone that can be limited to specific days and times and date ranges. It also contains a camera that records video of activity and sends pictures with alerts and text notifications. Priced at $278 it’s pricey but well-designed and very slick.