Meet the Ya-Man Medi Karada Walk EMS Stepper: an electrical muscle stimulation system that doubles as a stepper to give you a good workout. It comes with 15 EMS levels for you to choose from. It also moves in two different axes to work your leg muscles.
This EMS stepper lasts up to 4 hours on battery, so you can easily take it anywhere. It weighs only 3.3lbs.