The Casio F-B100W-1B digital watch combines classic style with modern technology, featuring Bluetooth® Mobile Link for automatic time correction and easy settings configuration via your smartphone. A built-in accelerometer automatically tracks daily steps and displays progress directly on the multifunction LCD screen, supporting active daily routines and health management.

Built with a slim 8.8 mm profile and weighing just 26 g, the watch incorporates a lightweight resin case and a vented bio-based resin band designed for enhanced airflow and all-day wrist comfort.

Practical timekeeping features include a 1/100-second stopwatch with a 200-lap memory, a countdown timer, dual time display, 5 daily alarms, and an LED backlight for clear visibility in low light.

Key Features

Case size (L× W× H)	41.9 × 38.1 × 8.8 mm
Weight	26 g
Case and bezel material	Resin
Band	Bio-based resin band
Glass	Resin Glass
Compatible band size	145 to 215 mm
Water resistance	Water Resistant
Time adjustment	Bluetooth: Connects to a smartphone and automatically adjusts the time
Power supply and battery life	Approx. battery life: 2 years on CR2016
Sensor feature	Step Count Measurement: Step count display range : 0 to 999,999 steps Step goal progress display (step count goal setting range: 1,000 to 50,000, 1,000-step increments) Step reminder Step count graph
Smartphone Link feature	Mobile link (Wireless linking using Bluetooth®)
Apps	CASIO WATCHES
App connectivity feature	Auto time adjustment, Easy watch setting, Approximately 300 world time cities, Life log data, Time & place, Phone finder
World time	Dual time (home time swapping)
Stopwatch	1/100-second stopwatch (Up to 200 lap records)
Timer	Countdown timer (up to 60 minutes)
Alarm/hourly time signal	5 daily alarms, Hourly time signal
Light	LED backlight (Green)
Calendar	Full auto-calendar (to year 2099)
Accuracy	±15 seconds per month (with no mobile link function)

Highlights

Water resistant
Keeps accurate time
Easy to operate via smartphone
Tracks step count
Displays dual city time
Classical design

Downloads

Operation Guide

Frequently asked questions

Does the Casio F-B100W-1B track daily steps?

Yes, it features a built-in accelerometer that automatically measures steps, shows goal progress, displays a step count graph, and provides step reminders.

How does the watch connect to a smartphone?

It connects wirelessly via Bluetooth using the CASIO WATCHES app for automatic time adjustment and easy configuration of watch settings.

What is the battery life of the Casio F-B100W-1B?

The watch has an approximate battery life of 2 years on a CR2016 battery.

What are the dimensions and weight of the watch?

The watch case measures 41.9 × 38.1 × 8.8 mm and weighs approximately 26 g.

What material is used for the band?

The watch features a bio-based resin band designed with inner slits for airflow and comfort.

Is the Casio F-B100W-1B water resistant?

Yes, the watch is rated as Water Resistant.

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