The main component is the luminous ring that provides even distribution of light around the key, guaranteeing optimal readability and signal effectiveness even at great distances. Keys have a total dia of 25 mm, with 16 mm of actual pressing area. Short-stroke key with either embossment or raised edge has a lifespan of at least 1 million uses. Available in red, green, and yellow, and can be combined into 1- or 2- color variants as needed. Hygienic design makes the keys suitable for use in food industry.