If you’ve ever needed to know who or what is in the next room before entering (and i dont mean in ) you need to buy some of these guys: Rolling Tactical Eyeballs

r1 all sm Like something out of Splinter Cell

These rolling cameras can be thrown into a room ahead of an invading force in order to scope things out. Each ball can take video as it rolls or stay stationary. A wireless connection controls the rotation and angle and the balls transmit and video.

You can even drop these things off a two-storey building into the thick of things.