The F-91W-1 is a digital watch with a resin case and strap. Its dimensions are 38.2 × 35.2 × 8.5 mm, its weight is 21 g, and it features a stopwatch, alarm and light. The water-resistance claim is retained within its declared scope, without assigning it a specific usage depth. This listing describes declared features and is not a test of accuracy, comfort or battery life.