The Seiko Astron watch obtains the user's location and determines the time zone and precise time each day by automatically receiving time signals and, if necessary, connecting to at least four GPS satellites in orbits the Earth. Its hands automatically adjust to the exact local time with the precision of an atomic clock. Seiko Astron is solar powered, so there is no need to replace batteries; it is also equipped with a perpetual calendar, so its date is always as precise as the time.
Citizen is definitely better. First, Citizen, Seiko and Casio are the three big brands in Japan. Each brand has its own technology and positioning. However, when it comes to using light as an energy driver to obtain electrical energy, it is still a good choice. one of the three. Citizen is the originator of search technologye and development on photodynamic energy and filed a patent application for the name “Eco-drive”. Citizen is far ahead in light energy research. Its products are mainly equipped with light kinetic energy technology. Based on light kinetic energy technology, Citizen's products are excellent in convenience, durability, fashion, environmental protection and have a good reputation. on the market. Also amazing. Compared to Citizen, Seiko is worse in this regard. It still uses solar energy as a light source. If you understand, many people will not choose Seiko's solar powered watches. As for Casio, most of its watches are quartz electronic watches, and its R&D and utilization capabilities in light energy technology are only average.
Photodynamic energy is Citizen's core technology. This technologyIt mainly powers the watch via light sources. It does not require frequent battery replacement and can be powered by a weak light source. And when the watch is not used for a long time and is in the dark, the watch will enter power saving mode. So even if it is exposed to a dark environment for a long time, it can continue to work for 6 months. 10 years. When using it, take it anywhere there is light for lounging, and the time display will automatically catch up to the current normal time. In addition, the current temporal accuracy of photodynamic energy can reach an annual error of ±5 seconds. Compared with the accuracy of ordinary mechanical watches and quartz watches, this error can be ignored. Eco-Drive is not only convenient and practical, but also has many functions, from simple calendar displayFrom weekly to more complex perpetual calendar, chronograph, world time, alarm, etc., there are many styles to choose from. Not only that, Citizen also added its own two black technologies, electric wave and satellite time synchronization, to some luminous kinetic energy watches, making the watches more precise and complex in function.
In terms of after-sales service, Citizen has also achieved the best. Citizen entered China relatively early, more than 60 years ago, and its sales outlets and after-sales services are relatively complete. Judging from the warranty period, Casio currently gets a 1-year warranty, Seiko gets a 2-year warranty, and Citizen Eco-Drive gets a 3+2-year extended warranty. Taking these things into account, you should choose Citizen Eco-Drive.