Calypso IKM0993 Instruction Manual page 24

14. HOW TO USE EL LIGHT
NOTE
1. This watch features an electro-luminescent (EL) backlight, which tends to lose
illuminating power after very long use.
2. The illumination provided by backlight may be hard to see under direct sunlight.
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15. SOUND 1. MODO DE VISUALIZACIÓN Y OPERACIÓN DE LOS BOTONES
1. Button tone: Turn ON or OFF, see "How to set function display."
2. Beeps with each press of a button except for the LIGHT button.
3. The button will only beep once when pressed and held.
4. Alarmduration: 20 sec, two short beeps per second, beep once every hour.
5. The TIMER sound will take priority over the ALARM sound.
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