Unfortunately, anyone using a Bioness device is required to have a prescription for use from a physician. Bioness cannot legally or ethically support anyone’s use of any device purchased “used” from another individual. Therefore, if you purchase a Bioness device in this manner you will not be able to receive technical support or supplies. This policy is enforced to protect individuals as Bioness cannot be sure that the second-hand device is in proper and safe working order. Failure to abide by this policy is potentially dangerous for the user. Bioness can be reached at 1.800.211.9136, option 2 to answer any questions.