These watches I wear for more than 20 years, day and night even in tough labor. (Ca, 1-2 years, then outfit is slightly scratched or broken bracelet, then there 'ne new. Ordinary clock, easy to adjust. Unsurpassed valuable but is the bright light, I do not want to miss, because I often use even as emergency lighting, zb.in a hotel room where you can not to find your way in the dark, if you take a night where needs and dearest not floodlit would awaken. Has everything a clock needs.