---
product_id: 684146281
title: "F-91WB Series | Men’s Digital Watch | Turquoise | Bio-Based Resin Band | LED Backlight | Stopwatch | Daily Alarm | Auto Calendar | 12/24 Hour Format | Water Resistant"
brand: "casio"
price: "€ 68.30"
currency: EUR
in_stock: true
reviews_count: 13
category: "Casio"
url: https://www.desertcart.pt/products/684146281-f-91wb-series-men-s-digital-watch-turquoise-bio-based
store_origin: PT
region: Portugal
---

# Water resistant durability 7-year battery life 1/100-sec stopwatch precision F-91WB Series | Men’s Digital Watch | Turquoise | Bio-Based Resin Band | LED Backlight | Stopwatch | Daily Alarm | Auto Calendar | 12/24 Hour Format | Water Resistant

**Brand:** casio
**Price:** € 68.30
**Availability:** ✅ In Stock

## Summary

> ⌚ Timeless tech meets sustainable style — never miss a beat!

## Quick Answers

- **What is this?** F-91WB Series | Men’s Digital Watch | Turquoise | Bio-Based Resin Band | LED Backlight | Stopwatch | Daily Alarm | Auto Calendar | 12/24 Hour Format | Water Resistant by casio
- **How much does it cost?** € 68.30 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/684146281-f-91wb-series-men-s-digital-watch-turquoise-bio-based)

## Best For

- casio enthusiasts

## Why This Product

- Trusted casio brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Built to Last:** 7-year battery and water resistance for worry-free daily wear
- • **All-Day Functionality:** Stopwatch, daily alarm & 12/24-hour format to master your schedule
- • **Precision Timekeeping:** Quartz movement with ±30 sec/month accuracy keeps you punctual
- • **Night-Ready Visibility:** Green LED backlight ensures time checks anytime, anywhere
- • **Sleek Turquoise Minimalism:** Lightweight bio-based resin band for eco-conscious style

## Overview

The Casio F-91WB Series men's digital watch combines a slim, lightweight turquoise bio-based resin band with multifunctional features including a 1/100-second stopwatch, daily alarm, auto calendar, and 12/24-hour format. Its green LED backlight enhances nighttime readability, while a 7-year battery and water resistance ensure reliable, long-lasting performance for everyday use.

## Description

Buy Casio F-91WB Series | Men’s Digital Watch | White | Bio-Based Resin Band | LED Backlight | Stopwatch | Daily Alarm | Auto Calendar | 12/24 Hour Format | Water Resistant | 7 Year Battery and other Wrist Watches at desertcart.com. Our wide selection is eligible for free shipping and free returns.

Review: Timeless, Reliable, and Incredibly Affordable! - The Casio F-91WB Series is an absolute classic that never goes out of style. I’ve been wearing mine daily for months now, and I’m consistently impressed by its reliability, comfort, and value. The retro design is simple yet iconic, and it’s the perfect watch for anyone who loves a clean, minimalist aesthetic. The digital display is easy to read, even in low light, and the alarm and stopwatch functions work flawlessly. It’s also shock-resistant and water-resistant, which makes it a great all-around, everyday watch. What really stands out is the battery life—it lasts forever! After months of daily use, the battery is still going strong. The band is comfortable and fits well, and it’s also adjustable, making it suitable for all wrist sizes. For the price, you really can’t find a more practical and reliable watch. Whether you're using it for sports, work, or just day-to-day wear, the Casio F-91WB is a fantastic choice. Highly recommended!
Review: Quality for the price, Useful features, Passes authenticity check, Third-party modification support - This really is a great little watch for the price. Casio watches aren't exactly top notch fancy timepieces made to catch the eye, but I personally think that's what's great about it. No gimmicks or bulk, just a watch that does what it's made for, and does so beautifully. It passes the standard authenticity check of holding down the bottom right button until "CASIo" appears on the screen, and doesn't show any signs I can see of being a dupe or fake. The backlight doesn't really do much, but in a pinch (e.g. complete darkness) it'll help you see the watch face enough to know the time. You can actually get third-party modifications done to get a better backlight if you'd like, but of course that's not included with the standard watch itself. The watch can do standard 12hr and 24hr time cycles, has an alarm (which can also just beep once every hour instead of going off at a set time), a stopwatch (which resets once it goes past 1 hour due to the limits of the display), and keeps time quite well so far. I've only noticed a fraction of a second delay, which could have just been user error. It also makes it quite easy to reset just the seconds by cycling through the mode screen, then pressing the right button on the main watch screen, so fixing it if it does drift is a breeze. The watch strap is good for what it is, not anything like a super solid high quality metal strap, but what you'd expect from a flexible watch strap. It doesn't feel like it'll easily scratch, rip, or expand, but also feels flexible enough to hold itself comfortably on your wrist. I've already dropped it multiple times, with no signs of any issues, so I'd say that counts towards its claims on durability too. If you just want a watch that works, won't die on you the second you drop it, and has simple creature comforts like an alarm and stopwatch, this is hard to beat, especially for the price, and massive market for third-party modifications that Casio watches are practically known for at this point. If you want, you can seemingly get anything from a better backlight to an inverted color/sparkly screen. Heck, you can even 3D print custom replacement cases and bands for it if you want! To sum that all up, if you need a watch, and you don't want anything flashy, get this watch. It'll do more than keep time, and even if you were to lose or break it tomorrow, the cost of a replacement or repair is a drop in the bucket.

## Features

- SLIM & LIGHTWEIGHT DESIGN WITH TURQUOISE ACCENT: The Casio F-91WB Series features a sleek and minimalist design with a turquoise resin case and band, giving it a modern and stylish appeal. The compact size and lightweight construction provide a comfortable fit, making it ideal for everyday wear.
- BIO-BASED RESIN BAND FOR SUSTAINABILITY: Designed with a bio-based resin band, this watch incorporates materials that help reduce environmental impact. The durable yet flexible strap ensures a secure and comfortable fit, while the adjustable buckle closure allows for a customized wrist size.
- MULTIFUNCTIONAL TIMEKEEPING WITH STOPWATCH & ALARM: Equipped with a 1/100-second stopwatch, this watch supports elapsed, split, and first/second place timing—perfect for workouts, training, and daily tasks. The daily alarm and hourly time signal help keep schedules on track, ensuring you stay organized throughout the day.
- LED BACKLIGHT FOR NIGHTTIME VISIBILITY: The green LED backlight enhances readability in low-light conditions, allowing for quick time checks at night or in dim settings. The auto-calendar function, pre-set through February, ensures accurate date tracking without manual adjustments.
- LONG-LASTING 7-YEAR BATTERY & RELIABLE PERFORMANCE: Powered by a CR2016 battery, this watch delivers up to 7 years of operation, minimizing the need for frequent replacements. The quartz movement provides precise timekeeping, with an accuracy of ±30 seconds per month, ensuring dependable functionality for daily use.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0DK42VCQ4 |
| ASIN  | B0DK42VCQ4 |
| Age Range Description | Adult |
| Band Color | White |
| Band Material Type | Resin |
| Band Width | 22 Millimeters |
| Bands | 1 |
| Batteries  | 1 Lithium Metal batteries required. (included) |
| Best Sellers Rank | #103,975 in Clothing, Shoes & Jewelry ( See Top 100 in Clothing, Shoes & Jewelry ) #252 in Men's Wrist Watches |
| Brand Name | Casio |
| Case Diameter | 35.2 Millimeters |
| Case Material Type | Resin |
| Case Thickness | 8.5 Millimeters |
| Clasp Type | Buckle |
| Closure Type | Buckle |
| Crystal | Mineral Glass |
| Customer Reviews | 4.6 4.6 out of 5 stars (162) |
| Date First Available  | January 9, 2025 |
| Department  | Unisex |
| Dial Color | Clear |
| Display | Digital |
| EU Spare Part Availability Duration | 7 Years |
| Face Style | Minimalist |
| Included Components | Watch |
| Item Type Name | Casual Watch |
| Item Weight | 0.12 Kilograms |
| Item model number  | F-91WB-7ACF |
| Manufacturer | Casio |
| Manufacturer  | Casio |
| Manufacturer Part Number | F-91WB-7ACF |
| Model Name | F-91WB |
| Model Number | F-91WB-7ACF |
| Package Dimensions  | 4.37 x 3.58 x 3.39 inches; 4.23 ounces |
| Power Source | Battery Powered |
| Shape | Octagonal |
| Strap Type | Two Piece Strap |
| Style Name | F91WB-7A |
| UPC | 889232378442 |
| Warranty Type | Manufacturer |
| Watch Movement Type | Quartz |
| Water Resistance Level | Water Resistant |

## Images

![F-91WB Series | Men’s Digital Watch | Turquoise | Bio-Based Resin Band | LED Backlight | Stopwatch | Daily Alarm | Auto Calendar | 12/24 Hour Format | Water Resistant - Image 1](https://m.media-amazon.com/images/I/31CggeiEJUL.jpg)

## Available Options

This product comes in different **Color, Style** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Timeless, Reliable, and Incredibly Affordable!
*by J***B on August 19, 2025*

The Casio F-91WB Series is an absolute classic that never goes out of style. I’ve been wearing mine daily for months now, and I’m consistently impressed by its reliability, comfort, and value. The retro design is simple yet iconic, and it’s the perfect watch for anyone who loves a clean, minimalist aesthetic. The digital display is easy to read, even in low light, and the alarm and stopwatch functions work flawlessly. It’s also shock-resistant and water-resistant, which makes it a great all-around, everyday watch. What really stands out is the battery life—it lasts forever! After months of daily use, the battery is still going strong. The band is comfortable and fits well, and it’s also adjustable, making it suitable for all wrist sizes. For the price, you really can’t find a more practical and reliable watch. Whether you're using it for sports, work, or just day-to-day wear, the Casio F-91WB is a fantastic choice. Highly recommended!

### ⭐⭐⭐⭐⭐ Quality for the price, Useful features, Passes authenticity check, Third-party modification support
*by A***X on July 20, 2025*

This really is a great little watch for the price. Casio watches aren't exactly top notch fancy timepieces made to catch the eye, but I personally think that's what's great about it. No gimmicks or bulk, just a watch that does what it's made for, and does so beautifully. It passes the standard authenticity check of holding down the bottom right button until "CASIo" appears on the screen, and doesn't show any signs I can see of being a dupe or fake. The backlight doesn't really do much, but in a pinch (e.g. complete darkness) it'll help you see the watch face enough to know the time. You can actually get third-party modifications done to get a better backlight if you'd like, but of course that's not included with the standard watch itself. The watch can do standard 12hr and 24hr time cycles, has an alarm (which can also just beep once every hour instead of going off at a set time), a stopwatch (which resets once it goes past 1 hour due to the limits of the display), and keeps time quite well so far. I've only noticed a fraction of a second delay, which could have just been user error. It also makes it quite easy to reset just the seconds by cycling through the mode screen, then pressing the right button on the main watch screen, so fixing it if it does drift is a breeze. The watch strap is good for what it is, not anything like a super solid high quality metal strap, but what you'd expect from a flexible watch strap. It doesn't feel like it'll easily scratch, rip, or expand, but also feels flexible enough to hold itself comfortably on your wrist. I've already dropped it multiple times, with no signs of any issues, so I'd say that counts towards its claims on durability too. If you just want a watch that works, won't die on you the second you drop it, and has simple creature comforts like an alarm and stopwatch, this is hard to beat, especially for the price, and massive market for third-party modifications that Casio watches are practically known for at this point. If you want, you can seemingly get anything from a better backlight to an inverted color/sparkly screen. Heck, you can even 3D print custom replacement cases and bands for it if you want! To sum that all up, if you need a watch, and you don't want anything flashy, get this watch. It'll do more than keep time, and even if you were to lose or break it tomorrow, the cost of a replacement or repair is a drop in the bucket.

### ⭐⭐⭐⭐⭐ Classic, Simple, Reliable
*by A***R on December 17, 2025*

Classic style Bold choice

## Frequently Bought Together

- Casio F-91WB Series | Men’s Digital Watch | Turquoise | Bio-Based Resin Band | LED Backlight | Stopwatch | Daily Alarm | Auto Calendar | 12/24 Hour Format | Water Resistant
- Casio F91W Series | Digital Watch | Water Resistant | LED Light | 1/100 SEC Stopwatch | Regular Time Keeping (HR, Min, SEC, PM, Date, Day) | Daily Alarm | Lightweight | 7 Year Battery

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*Product available on Desertcart Portugal*
*Store origin: PT*
*Last updated: 2026-03-14*