Just like the specs say, it's solar powered and synced to the atomic clock standard. Basically, you set the time zone and you are done. You never have to set it or change a battery. It must have a battery, but it will likely outlast me.

It would be nice if the date was a bit more visible, but most people will be able to read it fine. Also, the auto DST doesn't quite work now that the DST window has been expanded. Still, an excellent watch for a very low price.