Ummm...I don't get it.
A ropeless jump rope? So basically you can get the same effect by holding hairbrushes in your hands and setting an egg timer. :+
FWIW - A properly sized jump rope doesn't take up much room to use. Once I figured out how to size mine right, I was able to jump in a room with a 7ft 3in ceiling. Stepping actually takes more room.
Just a thought...