The PIONEER TachyTele features in addition to the stop function two practical scales which are easily readable against the dial, thanks to their red finish: the tachymeter scale for measuring average speeds is incorporated in the centre of the dial in a spiral formation. As this scale allows for a total of three revolutions of the stop indicator hand, it considerably extends the measurement range, enabling even relatively slow speeds of 60 km/h down to 20 km/h to be measured. The telemeter scale, which is printed on the peripheral edge of the dial, is used for measuring distances, taking into account the speed of sound.