The Riester Wall Diagnostic Station Extension Module with 1 handle and a 3.5 V / 120 V lamp is ergonomic and non-slip. The handles switch on and off automatically when removed from or replaced in the handle unit. The adjustable light intensity setting is maintained until the next examination. The Rheostat enables continuously adjustable brightness as well as manual switching on and off. The spiral cord of this extension module can stretch up to 3 m or close to 10 feet, can accomodate up to 4 handle modules available for expanding the ri-former basic module. The Extension Module comes complete with all mounting plate, plugs, screws, and instructions for assembly.