Product Description 3 Years - One battery will power your watch for approximately 3 years. Scratch-resistant hardened mineral glass. Always reliable brass case and stainless steel bracelet: This watch features a particularly secure safety catch, which helps prevent accidental opening of the bracelet. Water resistance (WR) classification to DIN 8310/ISO 2281. This model is water resistant according to the DIN 8310/ISO 2281 standard and is therefore resistant to light splashes. Any further contact with water should be avoided. Accuracy: -20 seconds per month.