G-Shock GW-1800DJ-1A9 - Manual (Page 39)

E-38
Illumination
An LED (light-emitting diode) and light guide panel
illuminate the digital display for easy reading in the dark.
• See “Illumination Precautions” on page E-63 for other
important information.
To turn on illumination
In any mode (except a setting mode), press B to
illuminate the face of the watch.
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