This is an Fgart mountain bike for adults which is electric. It has a 36v motor and can reach up to 35km/h and there are three modes of riding that you can choose between. You can go all electric if you are tired, use the pedal assist to help you in rough terrain or just pedal to save the battery. It takes 3-4 hours to charge and can last up to 60 miles in the pedal assist mode depending on the terrain. It also has a smart computer where you can check on the battery status, speed and trip distance as well as the mode you are in.