After the easy calibration the gear knob shows the respective gear. The display colour can be selected freely & matches optimally the instrument lighting of the vehicle. Features. Extravagant, sporty look, together with economic efficiency. Fits on all manual gearboxes of 8 to 14 mm, with up to six gears (except in case of gear levers with reverse gear locking) & is designed for all possible gear-shift patterns. Light sensor adjusts the brightness of the digital display to the ambient light.