This bicycle is a very good value since it can be used in either manual or electric mode. Both the handlebar and seat height and inclination are adjustable. After assembly and a little trial and error, I managed to figure out the functions and use of all the controls. In the manual mode the bike acts like any other six-speed, there is a little red button that switches between manual and electric with each push. The electric mode is used either with the handlebar twist throttle or by peddling which activates it. The pedal brings the bike up to full speed while peddling slightly and with the throttle the speed is adjustable. I am very happy with my purchase.