Orient UB8A002B Series, Instruction Manual

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ENGLISH
(11) About “luminous light”
Some models have luminous light on the hands and dial.
The luminous light is a safe paint that stores sunlight and artificial light
without using any radioactive material, and emits that light in a dark
setting. As the paint discharges the stored light, it will become dimmer
over time. The amount of light emitted and the time that light is emitted
depends on various factors when the light is stored, such as the shape
of the glass, the thickness of the paint, surrounding brightness level, the
distance from the watch to the light source, and the light absorption level.
Please note that when not enough light energy is stored, the watch may
emit weak light or emit light for only a short time.
(12) Water resistant watchband
Some models employ leather and nylon bands on which a special
treatment to resist perspiration and water absorption have been applied.
Please understand that the water resisting effect of this watchband can be
lost depending on the period and conditions of use.