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The Casio F91W-1 is a digital watch in a black resin case and strap, with a 38.2 mm case, a 1/100-second stopwatch, hourly time signals, a daily alarm and a backlight. Its long battery life and light weight make it a low-effort everyday watch. It is the reference point for cheap digital watches: rivals add more sensors or a bigger display, but few match its simplicity and durability. Owners praise its reliability and comfort; critics note the dim backlight, the basic resin strap and the lack of a countdown timer.
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Owners rate the F91W-1 highly for its reliability, light weight and long battery life. Complaints focus on the dim backlight, the basic strap and the lack of a countdown timer.
The Casio F91W-1 is a men's sport wristwatch with a classic resin design. It has a resin strap and a black finish. The watch is lightweight.
It has a 7-year battery. It also has multi-function alarms and water resistance.






