Are robot vacuums worth it or more hassle than helpful? We say the first one — but Black Friday is a great time to try one for yourself. Credit: Ian Moore / Mashable Deal pricing and ...

Are robot vacuums worth it or more hassle than helpful? We say the first one — but Black Friday is a great time to try one for yourself. Credit: Ian Moore / Mashable Deal pricing and ...

This is Guardbot, a surveillance robot that's able to manoeuvre on any terrain, even having the ability to swim. The device comes in a variety of sizes, ranging from as small as 5 inches to a ...