CASIO documents the F-91W-1 as a digital watch with a resin case and strap. Its Spanish page lists dimensions of 38.2 × 35.2 × 8.5 mm, a weight of 21 g, a stopwatch, alarm and light. The water-resistance claim is retained with the scope stated by the brand, without assigning it a specific usage depth. This listing describes stated features and is not a test of accuracy, comfort or battery life.
