---
product_id: 725169318
title: "F91W Series | Digital Watch | Waterproof | LED Light | 1/100 SEC Stopwatch | Permanent Display (HR, Min, SEC, PM, Date, Day) | Daily Alarm | Lightweight | 7 Year Battery, Black///White, Minimalist"
brand: "casio"
price: "€ 116.82"
currency: EUR
in_stock: true
reviews_count: 5
category: "Casio(カシオ)"
url: https://www.desertcart.fi/products/725169318-f91w-series-digital-watch-waterproof-led-light-1-100-sec
store_origin: FI
region: Finland
---

# 7-year battery life Eco-friendly bio-resin band Illuminator for night visibility F91W Series | Digital Watch | Waterproof | LED Light | 1/100 SEC Stopwatch | Permanent Display (HR, Min, SEC, PM, Date, Day) | Daily Alarm | Lightweight | 7 Year Battery, Black///White, Minimalist

**Brand:** casio
**Price:** € 116.82
**Availability:** ✅ In Stock

## Summary

> ⌚ Timeless tech meets eco-conscious cool

## Quick Answers

- **What is this?** F91W Series | Digital Watch | Waterproof | LED Light | 1/100 SEC Stopwatch | Permanent Display (HR, Min, SEC, PM, Date, Day) | Daily Alarm | Lightweight | 7 Year Battery, Black///White, Minimalist by casio
- **How much does it cost?** € 116.82 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.fi](https://www.desertcart.fi/products/725169318-f91w-series-digital-watch-waterproof-led-light-1-100-sec)

## 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

- • **Always Visible:** Built-in illuminator ensures clear time reading in the dark
- • **Sustainable Style:** Bio-based resin band reduces environmental footprint
- • **Minimalist Mastery:** Sleek, lightweight design perfect for everyday professional wear
- • **Effortless Longevity:** 7 years of uninterrupted timekeeping with CR2016 battery
- • **Multi-Function Simplicity:** Alarm, stopwatch, and day/date display keep you on schedule

## Overview

The Casio F-91WB-1A is a minimalist digital watch featuring a durable bio-based resin band, a 7-year battery life powered by a CR2016 battery, and an illuminator for easy night-time readability. Designed for professionals who value simplicity and sustainability, it includes essential functions like alarm, stopwatch, and day/date display, all housed in a sleek, lightweight case with 200-meter water resistance.

## Description

FAVORITE FOR DEADS - Slim and lightweight with digital LCD, the F-91 has a minimalist face, less mode indicators and environmentally friendly materials. The bands are made of bio-based resin, which is expected to reduce environmental impact. With a day/date display, alarm, stopwatch and other convenient features, these watches are always ready.

Review: Light weight and functions are simple use
Review: The Casio F91W is one of the best starter watches that are great for everday use (work, school, etc). This full black version of it looks AMAZING. It is notably a bit smaller than the actual Casio F91W but nontheless it looks great. I love it for its simplicity and three modes, it does everything that you need it to, without overcomplicating it. The alarm has always worked great, but I wouldn't rely on it waking you up in the morning. The stopwatch works like, well, like a stopwatch. And the actual time is great, came out of the box set up perfectly and you can switch it to 24 hours if you prefer that. The only CON that I mention is the Casio F91W uses a single green LED light on the left hand side, this in my opinion does nothing for night time checking. It is barely noticable and the camera can't even capture how bad it is. I do not deduct stars for this though, because you can still read the time in pitch black anyways. Overall, I reccomend the Casio F91W for anyone who needs an alarm, time, or stopwatch with nothing more.

## Features

- Made of eco-friendly (bio-based) resin band
- The LCD display is equipped with an illuminator to ensure visibility in dark environments
- (longest) CR2016 model battery included for 7 years of battery life
- Other features include alarm, stopwatch (chronograph) and day display

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0DDWDKRWT |
| ASIN  | B0DDWDKRWT |
| Age Range Description | Adult |
| Amazon Bestseller | #879,353 in Clothing, Shoes & Jewelry ( See Top 100 in Clothing, Shoes & Jewelry ) #7,596 in Men's Wrist Watches |
| Band Color | Black |
| Band Length | 220 Millimeters |
| Band Material Type | Resin |
| Band Width | 20 Millimeters |
| Bands | 1 |
| Brand Name | Casio |
| Case Diameter | 35.2 Millimeters |
| Case Material Type | Resin |
| Case Thickness | 8.5 Millimeters |
| Clasp Type | Buckle |
| Closure Type | Buckle |
| Crystal | Resin |
| Customer Reviews | 4.6 4.6 out of 5 stars (227) |
| Date First Available  | December 4, 2024 |
| Department  | Men |
| Dial Color | Black |
| Display | Digital |
| Face Style | Minimalist |
| Included Components | 1 x Digital Watch |
| Item Type Name | Casual Watch |
| Item Weight | 0.12 Kilograms |
| Item model number  | F-91WB-1A |
| Manufacturer | Casio |
| Manufacturer  | Casio |
| Model Name | F-91WB-1A |
| Model Number | F-91WB-1A |
| Package Dimensions  | 13.69 x 11.71 x 6.91 cm; 120 g |
| Pattern | Solid |
| Power Source | Battery Powered |
| Release date  | September 1, 2024 |
| Shape | Octagonal |
| Sport Type | Swimming and Diving |
| Strap Type | Resin Strap |
| Style Name | Minimalist |
| UPC | 889232378329 |
| Warranty Type | 限定保証 |
| Watch Movement Type | Quartz |
| Water Resistance Depth | 200 Meters |
| Water Resistance Level | Water Resistant |

## Images

![F91W Series | Digital Watch | Waterproof | LED Light | 1/100 SEC Stopwatch | Permanent Display (HR, Min, SEC, PM, Date, Day) | Daily Alarm | Lightweight | 7 Year Battery, Black///White, Minimalist - Image 1](https://m.media-amazon.com/images/I/51B4HGpwHAL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by P***O on January 14, 2026*

Light weight and functions are simple use

### ⭐⭐⭐⭐⭐ Review
*by S***S on January 8, 2026*

The Casio F91W is one of the best starter watches that are great for everday use (work, school, etc). This full black version of it looks AMAZING. It is notably a bit smaller than the actual Casio F91W but nontheless it looks great. I love it for its simplicity and three modes, it does everything that you need it to, without overcomplicating it. The alarm has always worked great, but I wouldn't rely on it waking you up in the morning. The stopwatch works like, well, like a stopwatch. And the actual time is great, came out of the box set up perfectly and you can switch it to 24 hours if you prefer that. The only CON that I mention is the Casio F91W uses a single green LED light on the left hand side, this in my opinion does nothing for night time checking. It is barely noticable and the camera can't even capture how bad it is. I do not deduct stars for this though, because you can still read the time in pitch black anyways. Overall, I reccomend the Casio F91W for anyone who needs an alarm, time, or stopwatch with nothing more.

### ⭐⭐⭐⭐⭐ Review
*by I***O on February 23, 2026*

Lindo y funcional, todo lo que se necesita. Lo compre por que estaba harto de mi smartwatch y con este casio estoy mas que satisfecho

## Frequently Bought Together

- 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
- Casio AE1200WH Series | Men’s Digital Watch | 100M WR | Multi Alarms | 100 SEC Stopwatch | Countdown Timer | World Map for World Time | LED Light | LC Analog Display | 10 Year Battery
- Casio W800HG Series | Men’s Digital Watch | 100 Meter Water Resistance | Multi Function Alarm | 100 SEC Stopwatch | Auto Calendar | Countdown Timer | LED Light | Dual Time| 10 Year Battery

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*Product available on Desertcart Finland*
*Store origin: FI*
*Last updated: 2026-03-19*