I wear this watch since April 2007, I never had to adjust or change batteries in nearly 8 years. The description does not say, but it is a "wave captor" which starts the time automatically, even during the time change, by capturing radio signals. It is also a solar watch, that only needs light to recharge. In addition it is rather aesthetic. She took a few claws, because in the beginning I used as "shows all trades" when I did not want to watch prices, and I have not spared. Today, the price of watches gather dust and I did not put that there.
