The watch uses a light-emitting diode (LED) for illuminating the dial. Elapsed time, intermediate time, and end time are measured with an accuracy of 1/100 seconds. The watch can measure times of up to 24 hours. For precision enthusiasts, the countdown timers help remind you of specific or recurring events by emitting an acoustic signal at a preset time. They then automatically count down from the preset time. The time can be set accurately to the minute and up to 24 hours in advance. This is ideal for people who need to take medication every day or engage in interval training. This model is equipped with 5 independent multifunction alarms. It has the perfect alarm for every type of appointment. The model features a total of four repeat alarms: 1. daily alarm, which sounds at the same time every day, 2. date alarm, for example, to remind you of birthdays, 3. monthly alarm, which sounds on the same day at the same time every month, 4. alarm for every day of a specific month. Each time you stop the alarm, it will sound again after a few minutes. Once set, the automatic calendar always displays the correct date.