Seiko 7B24 Manual - Page 82

Specifications 1. Frequency of crystal oscillator 32,768 Hz (Hz = Hertz ... Cycles per second) 2. Loss/gain (monthly rate Loss / gain ±15 seconds on a monthly rate (Except the case when the watch is used without an automatic time setting by receiving a radio signal and when it is worn on the wrist within a normal temperature range between 5℃ and 35℃ ). 3. Operational temperature range Between −10℃ 〜 +60℃ 4. Driving systems Step motor (Hour and minute hands, second hand, and the date) 5. Power source Secondary battery, 1 piece 6. Duration of operation Approximately six months (Fully charged, and the Power Save is not activated). ※ If the Power Save is activated after it is fully charged, the watch continues to run for approximately one year and a half at maximum. 7. Time setting by receiving the JJY-LF radio signal Automatic reception (at 2:00 AM 3:00 AM and 4:00 AM) ※ Reception attempts depend on the radio signal receiving conditions. ※ After having received a radio signal, the watch will start to move depending on the quartz movement until the next reception. ※ Manual reception is also possible 8. IC (Integrated Circuit Oscillator, frequency divider and driving circuit C-MOS-IC, 3 pieces ※ The specifications are subject to change without prior notice for product improvement. 162 Specifications