The Casio F-91WB-7A is a classic and timeless digital watch, celebrated for its simple design, durability, and eco-friendly features. It is part of the Casio Vintage collection and features a lightweight grey resin case and a comfortable grey bio-based resin strap. The watch has a unique White dial with a reverse LCD display, giving the numbers a dark background and a vibrant, legible appearance. It also has a green LED backlight for easy reading in the dark. Powered by a reliable quartz movement, it boasts an impressive 7-year battery life and is water-resistant, making it suitable for everyday wear. Key functions include a 1/100-second stopwatch, a daily alarm, and an auto-calendar.