The pedal exerciser RFM® digital is build to strenght the muscle, improve the blood circulation and the coordination of the lower extremities. The degree of resistance can be set indivually. The exersicer comes with a stable steel frame and non-slippery plastic feed.. This exerciser can easily sotred under a chair or bett for example Measurements : 51 x 30 x 23 cm (20.08"x11.8"x.9.05"). Disctance between the pedals: 21 cm (8.27").