Citizen C660 User Manual

1. Features
This watch is a combination solar-powered watch that contains a solar cell in its
face that drives the watch hands, race timer, chronograph, alarm, and numerous
other functions by converting light energy into electrical energy.
It is also equipped with convenient functions including a power save mode that
reduces power consumption when light is not shining on the solar cell, UTC
(Coordinated Universal Time) and a world timer indicating the time and dates of
30 major cities around the world.
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2. Before Using the Watch
This watch is a solar-powered watch. Before using, allow light to shine
onto the watch so that it is sufficiently charged.
In this watch a secondary battery is used to store electrical energy. This
secondary battery is a clean energy battery that does not contain mercury or
other toxic substances. Once fully charged, the watch will continue to run for a
maximum of 4 years without additional charging (when in the power save 2
mode).
[Proper use of this watch]
To use this watch comfortably, make sure to recharge it before it stops running
completely. There is no risk of overcharging the watch no matter how often it is
recharged. (Overcharging Prevention Function).
It is recommended that the watch be recharged everyday.

Citizen C660 Specifications

Operating Environment

accuracy	±15 seconds per month
operating temperature range	0°C to +55°C
normal operating temperature range	+5°C to +35°C

Battery

battery type	Secondary battery
fully charged running time	Roughly 4 years
two-second interval running time	Roughly 1.5 days