The life fitness f1 smart treadmill is refined in the same biomechanics lab used for health club equipment it is specifically designed for the home setting with features including a new color scheme that enhances any room child safety lock for peace of mind and a quiet motor system that allows someone to workout without disturbing others in the house and its so sturdy that youll be amazed it folds key features of the life fitness f1 smart treadmill are as follows ultra efficient energy