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J-57
User Manual
Battery Levels
The battery icon below the time display indicates the remaining charge in the battery. Charge the device as
necessary in accordance with usage conditions.
Estimated Continuous Workout Measuring Time
Battery level
Operating time
indicator
10 to 6 hours
6 to 4 hours
4 to 2 hours
2 to 0 hours
Estimated Continuous Time Display Duration
: ON
: OFF
: Not supported
Device usage state
(no workout measuring)
Track Activity
Heart rate monitoring
*1
Auto Sleep
Seconds Display
Auto Search
®
Bluetooth
*1
Auto Sleep is active for 14 hours per day (internal evaluation criteria).
*2
The operation time varies depending on the environment, which affects GPS reception, and device settings
such as backlight settings.
Setup
*2
Maximum operation time
30 days
(advanced)
22
2 days
4 days
(normal)
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