Timer; To Enter The Timer Mode - Casio GB-6900B User's Manual For Watch Functions

Timer

The timer start time can be set in one-minute increments up to 100 hours. The
watch will sound a tone or vibrate for about 10 seconds when the end of the timer
countdown is reached.
See "To change the alarm/timer alert method" (page E-52).

To enter the Timer Mode

Current time
Minutes
Seconds
E-40
● ●
 I ntheTimekeepingMode,pressCfive
Hours
timestoentertheTimerMode.
See "Using Modes" (page E-14).
1/10 Second