The ETERNAL concept does have obvious advantages upon other existing Systems using optical technology. Unlike optoelectronic elements, the inductive concept is resistant to smoke, moisture, temperature and aging. Other electromagnetic systems found on the market are particularly sensible to the lateral room of the mechanism, and have heavier mobile elements (magnets or iron plates) that add an excessive weight to the crossfader. Such systems usually have a strange feel that can bother highly precise manipulations such as Scratching and Beat Juggling.