F-91WS-2 This Casio model features a blue resin band with a resin case and a blue digital display for a clean lightweight look. Built with resin glass and water-resistant construction, it offers a slim durable profile suited to dependable everyday 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 classic digital utility in a fresh everyday design.