Casio F91W Series | Digital Watch | Water Resistant | LED
Product Overview
The Casio F91W Series Digital Watch is a legendary timepiece known for its durability, simplicity, and everyday reliability. Designed for practical wear, it suits anyone seeking a no-nonsense digital watch that performs consistently without frills. Its lightweight build and classic digital display make it ideal for daily wear across work, school, or casual activities. Powered by a long-life battery and built to last, this watch delivers dependable timekeeping in a compact, unisex design. Whether you’re tracking time, setting alarms, or timing events, the F91W remains a trusted companion for millions.
Key Features
- 30 Meter (100 Feet) Water Resistant – Built to handle accidental splashes, rain, and brief contact with water, making it suitable for everyday use. Not intended for swimming, diving, or showering.
- LED Light – Illuminates the digital display with a simple button press, ensuring clear visibility in low-light conditions such as nighttime or dimly lit environments.
- 1/100 Second Stopwatch – Offers precise timing down to one-hundredth of a second, ideal for measuring short intervals during workouts, training sessions, or everyday tasks.
- Regular Timekeeping (HR, Min, SEC, PM, Date, Day) – Displays hours, minutes, seconds, AM/PM indicator, full date, and day of the week for comprehensive time management.
- Daily Alarm – Allows you to set a single daily reminder, helping you stay on schedule for appointments, medication, or routine activities.
- Lightweight Design – Weighing only 2.72 ounces, the watch sits comfortably on the wrist without bulk, making it ideal for all-day wear.
- 7-Year Battery Life – Equipped with a long-lasting battery that powers the watch for up to seven years under normal use, minimizing the need for frequent replacements.
Technical Specifications
- Model Number: F-91WS-2CF
- Dimensions: 6 x 6 x 4 inches
- Weight: 2.72 ounces
- Department: Unisex
- Battery: 1 product-specific battery included
- Water Resistance: 30 meters (100 feet)
- Display Type: Digital with LED backlight
- Functions: Time (HR, Min, SEC, PM), Date, Day, Stopwatch, Daily Alarm
- Manufacturer: Casio
- Date First Available: April 3, 2020
- ASIN: B086RQT2KC
Benefits & Use Cases
The Casio F91W excels in practical, everyday situations where reliability and simplicity matter most. Its water resistance makes it safe for handwashing, light rain, or accidental spills, while the LED light ensures readability during early mornings or nighttime. The 1/100 second stopwatch is useful for timing exercises, cooking, or sports drills, offering accuracy without complexity. With full date and day display, it helps users stay organized, and the daily alarm serves as a dependable reminder for routines. Thanks to its lightweight construction and unisex design, it fits comfortably on any wrist and appeals to a wide range of users—students, professionals, travelers, and fitness enthusiasts alike. The 7-year battery life means less maintenance and long-term value, making it a smart choice for those who prefer durable, low-effort accessories.
Important Notes
While the watch is water resistant up to 30 meters, it is not suitable for swimming, bathing, or submersion. Avoid pressing buttons underwater. The included battery is designed for extended use, but replacement may be required after several years depending on usage. Always refer to the manufacturer’s guidelines for care and maintenance. The product is not discontinued and remains in active production. For warranty claims or service requests, contact Casio customer support directly. Packaging includes the watch and pre-installed battery—no additional accessories are provided.
From the manufacturer
“Necessity is not the mother of invention, invention is the mother of necessity.” These are the words of one of Casio’s founders. The people who created Casio were determined to ‘invent necessity’—to create products that met latent needs with groundbreaking capabilities no one had ever seen before. Ever since, Casio has been doing just that, bringing new discovery and delight to people around the world. This is Casio’s way of building an even more prosperous, richly rewarding world.
Key Features
30 Meter (100 Feet) Water Resistant
Suitable for everyday use. Will withstand accidental splashes but not suitable for swimming.
Daily Alarm
1/100 Second Stopwatch
Casio Accuracy and Reliability
