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Operating Environment| operating temperature range | -10°C to +60°C |
|---|---|
| timekeeping accuracy | ±15 seconds per month |
| crystal oscillator frequency | 32, 768 Hz |
Battery| battery type | secondary battery |
|---|---|
| continuous running time when fully charged | About 5 months |
| continuous running time at 2-second interval movement | About 5 days |
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