super speed up to pc 150000.00g multi-function sports referee stopwatch

Overspeed PC3000 dual-track stopwatch

Main functions:

1. Stopwatch Timing: 1. Stopwatch Timing

                      2. Segmented Timing

                      3、Two-stage timing

Section Two: Time, Calendar, and Alarm Display

III. Setting the Time and Calendar

Setting the Alarm Time

Five, Battery Change