Stührling C1 is a multi-function quartz watch with a variety of features including a moon phase indicator, day and date display, and water resistance. The watch is powered by a 371-SR921SW battery with a life of about 2 years. It is suitable for everyday use and can withstand splashes of water while washing hands, showering, or swimming in shallow water. However, it is not recommended for scuba diving or other water activities that involve high water pressure.