F-91WM-2A This Casio model features a black resin band with a blue resin case and a black digital dial for a clean classic everyday look. Built with a lightweight resin construction, resin glass, and water resistance, it is designed for dependable daily wear. Confirmed functions include LED light, a 1/100-second stopwatch, daily alarm, hourly time signal, auto-calendar, and 12/24-hour format, making it a practical choice for users who want a simple and reliable digital watch for everyday use.