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It is a solar-powered watch that uses Citizen's Eco-Drive technology. This means it converts any light, natural or artificial, into energy to recharge the battery. So it never needs a traditional battery replacement.
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The Satellite Wave model has the added ability to sync its time globally using signals from GPS satellites. There is a small antenna under the dial that receives satellite signals.
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When in range of GPS signals, the watch syncs to the atomic clock time signal from satellites orbiting the Earth. This keeps the time accurate anywhere in the world and automatically adjusts for daylight savings time.
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Syncing can happen automatically when the watch is exposed to bright light. There is also a button on the case you can push to manually trigger a time sync if needed.
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Between syncs, the Eco-Drive technology keeps the watch powered and keeping accurate quartz time. The power reserve when fully charged is about 6 months
Very cool!
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There’s a seiko kinetic watch in my collection that charges a capacitor with a rotor, and turns off the hand movement when it senses no activity for a period of time (I don’t remember how long). Eventually, the capacitor went bad and the watch doesn’t hold a charge anymore. It probably lasted me 12 years before this happened. It still holds a place of honor in my watch box, but I haven’t been able to wear it for probably 6 years.
I don't know about Seiko, but you can get the Citizen capacitors replaced for a fairly reasonable charge. My wife's Eco-Drive needed a new capacitor after about 15 years. Mine is still going strong on its first after 25 years.
I hope citizen releases more gps watches. The concept is very cool.
I've been looking at the casio lineage, but this is cool. Shats the lug to lug? I have a small wrist.
I personally do not have the largest wrists and lean towards mid size watches. He's the link to citizen with all the specs https://www.citizenwatch.com/us/en/product/CC3035-50E.html?cgid=satellite-timekeeping
