Seated Pedal Exerciser, Senior FriendlyDesigned for sedentary crowd, Rollingsurfer under desk elliptical machine enhances mobility, stimulates blood circulation, and strengthens lower body muscles. An optimal pedal exerciser for seniors, recovery enthusiasts, and sedentary office workers! Easy to use, Auto & Manual Mode Leg exercise machine compact elliptical offers 2 different modes depending on your needs. Auto Mode(P1-P3) and Manual Mode(HR).The automatic mode(P1-P3) machine will change the direction and speed of rotation within 30 minutes. In manual mode, you can change the speed and direction of rotation you want within 30 minutes. (Rotate forward or backward. There are 5-levels speed(01-05) that can be changed , from 1.5KM/h to 5.7KM/h for your choice. )