You power the belt, you achieve the most efficient walking/jogging result you wanted! Fold it up, lock it in place and roll it away for storage. It is just that easy - keep the unit out of your way when not in use. Warranty is 90 days parts, 1 year frame. Maximum user weight is 250lbs. Not recommended or guaranteed for user over this limit. Note: Manual treadmill, it is self-powered and must hold onto the handles and walk with a fluid motion in order to make it work. Belt adjustment has been pre-adjusted; however, for information on belt adjustment page 13 from the manual can be viewed.