Plug the Slendertone controller into your chosen accessory, turn it on and it automatically pre-selects the right programme for you. You can control the time and intensity from the palm of your hand, and its fully rechargeable.. The controller allows you to build your collection over time and get new products as they become available; its the body-toning kit thats tailored to your needs. This product works with: All past and present Slendertone System products Slendertone Arms Accessory Slendertone Bottom Accessory The unique interchangeability of the Slendertone controller allows you to use it with different garments in the Slendertone range, not to mention share it with a friend or partner who have garments of their own.