Casio retro digital watch with Bluetooth and step counter 38mm F-B100W-1AEF

The Casio F-B100W-1AEF can be described as a modern evolution of the legendary Casio F-91W – one of the most recognizable digital watches in the world. The classic angular Casio design has been preserved, while the inside has been upgraded with modern technology including Bluetooth, automatic time adjustment and a built-in step counter. At the same time, the design also draws clear inspiration from even earlier Casio history, particularly the groundbreaking F-100 from 1978. The F-100 was Casio's first wristwatch with a resin/plastic case and became an important milestone for the brand's later digital watches. The F-B100W continues this retro heritage with its characteristic square shape, clear LCD display and classic colour details, while the outside of the strap uses the same design as the iconic F-91W. The result is a watch that feels unmistakably Casio, while still being designed for modern everyday use. The built-in motion sensor automatically records the number of steps taken throughout the day. The display lets you follow your daily step count and progress towards your personal goal, while more detailed activity information can be transferred to the CASIO WATCHES app. The watch can also alert you if your activity level has remained low for an extended period. Via Bluetooth, the F-B100W-1AEF connects to your smartphone and automatically corrects the time. The CASIO WATCHES app also provides easy access to settings, Life Log data, world time for around 300 cities and Phone Finder. Dual Time makes it easy to keep track of two different time zones. Despite its modern functions, Casio has retained the qualities that made its classic digital watches so popular: low weight, compact dimensions and simple operation. The F-B100W is only 8.8mm thick and weighs just 26 grams. The flexible bio-based resin strap features ventilation on the inside for improved comfort, while green LED illumination ensures good readability in the dark. Key benefits: * Modern evolution of the legendary Casio F-91W * Retro design inspired by the Casio F-100 from 1978 * Strap design carried over from the classic F-91W * Bluetooth connection to CASIO WATCHES * Automatic time adjustment via smartphone * Built-in step counter and activity tracking * Life Log with activity data in the app * World time for around 300 cities via the app * Dual Time for two time zones * 1/100 second stopwatch with memory for up to 200 times * 5 daily alarms * Countdown timer * Green LED illumination * Only 8.8mm thick and 26 grams * Approx. 2 years battery life Technical specifications: * Case: 41.9 × 38.1mm * Thickness: 8.8mm * Weight: 26 grams * Material: Resin * Strap: Black bio-based resin strap * Glass: Resin glass * Bluetooth: Mobile Link * App: CASIO WATCHES * Step counter: 0–999,999 steps * Step goal: 1,000–50,000 steps * Stopwatch: 1/100 second * Memory: Up to 200 lap/split times * Timer: Up to 60 minutes * Alarm: 5 daily alarms * Light: Green LED illumination * Calendar: Full auto-calendar to year 2099 * Accuracy: ±15 seconds per month without Bluetooth synchronization * Battery: CR2016 * Battery life: Approx. 2 years * Water resistance: Water Resistant * Strap fits wrist: 145–215mm The Casio F-B100W-1AEF is an especially interesting choice for anyone who likes the classic Casio look but wants more functionality than the original retro models can offer. It combines the design heritage of the F-100 and legendary F-91W with Bluetooth, a step counter and automatic time adjustment. A modern retro Casio that preserves the simplicity and charm of the originals without trying to be a full smartwatch.