Do you have a question about the iSport JG021 and is the answer not in the manual?
Explains how to cycle through stopwatch modes using the MODE button.
Shows individual lap times, recording lap 01 to lap 10.
Shows individual split times and total time simultaneously.
Enter Alarm 1 mode and set alarm time by pressing MODE, RESET, and SET.
Alarm 2 mode operates identically to Alarm 1 mode for setting alarms.