Reliefband's Custom USB Charging Cables are specifically designed for Reliefband Premier and Sport devices. Now you can order extra Reliefband charging cables to keep around the home, the office, in the car, or while traveling on vacations or on business trips. The USB Connector port gives you more freedom and flexibility to charge your device whenever or wherever you need it most. Charge in the car, on your laptop or workbook device, or plug into an adapter and recharge in an outlet.