The Dutch inventor Bruin Bergmeester has developed the "Lopifit" a mix between a scooter, a bike and a treadmill. Walking on it, you press a dynamo that powers an electric motor positioned at the rear wheel. Where you charge the battery this provides a range between 30 and 40 km. The Lopifit allows to travel at a maximum speed of 25 km / h. He is currently on sale on the site at a price of 1699 euros.