Ok, so it kind of defeats the purpose of a jump rope (minimalism,) but this thing is pretty sweet. It not only tracks your workout internally, but it displays your workout info hovering in mid-air, thanks to a strip of LED lights embedded in the rope. And no, you don’t have to jump rope in the dark; it even works in brightly lit rooms. It also comes in a slew of sleek color and material configurations. If you wanna impress all your friends in jump rope class, this is the way to do it.