Features of the Riester Ri-former L Extension Module: Automatic switch-on/off of handles when removing or replacing them in the handle unit. The adjusted light intensity setting is saved until the next examination. Ergonomic and non-slip. Rheostat: infinitely variable regulation of brightness as well as manual switching on/off possible on the handle. Spiral cord expandable up to 3 m. For expanding the ri-former® base module, up to 4 handle modules possible. Complete with wall mounting plate, plugs, screws, and assembly plan. The product referenced on this detail page is sold be Each.