This watch has been designed by Co-drivers for Co-drivers. We have incorporated many features requested by co-drivers, these include: User selectable functions. Choose from 9 modes, select to display only those you want to use. No more scrolling through unwanted functions. Larger, clearer digits. With matrix data display. Greater choice of pre start options and timer functions. Improved Timer display with time of day and target time. Memory recall has a “stage 0” for entering time penalties. Prolonged back light option. Speed, distance time calculator – enter any two variables to calculate the third. Independent 99 memory stopwatch. Battery door for easy battery changing. Water resistant.