The Flir One iPhone case, for example, comes with its own thermal imaging system that works with your iPhone's camera to add night vision capabilities and let you see through certain objects.

The $349 iPhone accessory, which was first unveiled at this year's CES and is now available through Flir's website, is more of an attachable camera than it is a case.

The Flir One comes with its own slim sleeve that slides into a dock that houses the thermal camera. The resulting combination adds a bit of bulk to your phone, but the Flir One isn't necessarily meant to serve as your everyday iPhone case. Rather, Flir is billing its case as an iPhone add-on for outdoor enthusiasts and do-it-yourself home repairs.