The Casio B640WGG-9DF is a stylish and functional digital watch that pays homage to vintage Casio designs. It is part of the Casio Vintage Collection and features a gold ion-plated resin case and a comfortable, gold ion-plated stainless steel that provides a secure fit. The watch's digital display has a classic black background with light digits, offering a clear and legible look. Powered by a reliable quartz movement, it has an approximate battery life of three years. Key functions include a 1/100-second stopwatch, countdown timer, multi-function alarm, and an LED backlight for easy visibility in the dark. With a water resistance rating of 50 meters, it is suitable for everyday wear and can withstand splashes and brief immersion. Its versatile design makes it a great choice for both men and women.