The display becomes visible when switched on. When switched off the display remains black. Impressive through their ingenious looks, these instruments fascinate not only Tuning-friends, but also Oldtimer-lovers & " Normal drivers". The instruments are available in several designs. Whether in single colour with silver background, illuminated with 7-coloured LEDs (switchable) or the path-breaking smoked-glass series " Night Flight"! There is one instrument series for every taste. The smoked-glass series " Night Flight" impresses through its highly modern looks & technology. With the ignition switched off, one sees only a black mirrored glass.