Vdo presents a new product line the m seriesvdo m1 all basic bike functions and a display with one huge digitthe vdo m1 is the entry level model in the vdo m series and impresses with it39s compact linear design and flat structure the brilliant portrait format display uses large letters and a specially developed font to show only one function making it easy to read even while cyclingavailable in both wired 40wr41 and wireless 40wl41 versions the vdo m1 entry level model is ai