I have requested that you accept the return of this item, P. O. #Order Number: 24100100911816092481 purchased online at Vevor. This item is still in the unopened shipping carton, it has not been touched or used in any way. Due to an injury to my knee that requires surgery and long-term rehabilitation am unable to (use) manage this equipment. I have had to abandon my intended project. Please accept this sincere explanation and honor your 30-day return policy. Kindest regards, Dr. Jerry Rollins, PsyD