The great outdoors can provide a relaxing reprieve from city life, but not if you spend all your time worrying about bears invading your camp. So even though it's designed for military use, this radar-in-a-backpack kit should provide ample peace of mind when roughing it.
The kit weighs less than 9kg when packed away, but when you've settled on a place to pop your tent, it can be set up in just three minutes. Once it's running, it will scan a 150-acre area for movement, reporting its finds to an included wireless tablet that shows the radar signal overlaid on map imagery so it's easier to pinpoint an intruder.
Some might say that using this portable radar kit outside of military applications is a little overkill, but they've probably never had a bag of marshmallows nicked by a possum. Nothing spoils a camping trip more than marshmallow-less s'mores, so consider this undoubtedly expensive kit insurance for a perfect weekend away. [SpotterRF via Popular Science]