Wheelchair users have about twice the prevalence of obesity than the general population. There is also very little or no technology to which they have access to measure their weight frequently in their homes. Research however, has shown that monitoring your body weight frequently (i.e. daily) yields significantly better weight loss and weight maintenance results. This research has never included wheelchair users because they have not had access to technology to be able to measure their weight daily. The E-scale was developed as a weight monitoring technology for wheelchair users and has been tested for precision and accuracy in the laboratory. The goal of this study is to determine the usefulness, feasibility and efficacy of the E-scale system coupled with a standardized behavioral treatment weight-loss intervention for overweight or obese wheelchair users.