Description
CASIO Collection STANDARD W-221H-1AJF
The CASIO Collection STANDARD W-221H-1AJF is a lightweight Japanese Domestic Market digital watch designed around clear time reading and practical everyday functions. Its wide digital display, black resin construction and metallic-finished square bezel create a simple, versatile appearance suitable for a wide range of wrists.
Large and Easy-to-Read Digital Display
The wide LCD uses large numerals to make the time easy to identify at a glance. Dedicated display areas provide access to the day, date and active function indicators without overcrowding the main time display.
W-221H-1AJF uses a conventional positive LCD rather than an inverted display. An amber LED backlight with selectable 1.5- or 3-second afterglow assists viewing in dark environments.
Compact and Lightweight Square Case
The resin case measures 43.7 mm from top to bottom, 38.4 mm across and 12.2 mm thick. At only 35 g, the watch offers a lightweight fit for everyday wear. The characteristic square case is complemented by a metallic-finished bezel and a flexible black resin band.
Approximately 10-Year Battery Life
The battery-powered quartz module provides an approximate battery life of ten years under CASIO’s stated operating conditions. This long-life design reduces the frequency of routine battery replacement while supporting the watch’s digital functions.
World Time and Everyday Functions
World time displays the time in 48 cities across 29 time zones and includes a daylight-saving time setting. Three multi-function alarms are provided, with a snooze function available for one alarm, together with an hourly time signal.
The 1/100-second stopwatch offers a 24-hour measuring capacity, split-time measurement and a five-second countdown auto-start function. A separate 24-hour countdown timer includes auto-repeat and a time-up pre-alert.
Flash Alert and Amber LED Backlight
The flash-alert function coordinates display illumination with alarms, the hourly time signal, countdown-timer alerts and the stopwatch auto-start countdown. The amber LED backlight includes afterglow and a selectable illumination duration of approximately 1.5 or 3 seconds.
Water-Resistant Resin Construction
The W-221H-1AJF features a resin case, resin glass and a black resin band. Its 5-bar water resistance provides practical protection for ordinary daily activities. The compatible stated wrist-size range is approximately 145 to 215 mm.
Japanese Domestic Market Model
W-221H-1AJF is the Japanese Domestic Market reference of the W-221H-1A. It was introduced in Japan in February 2026 and is identified by JAN code 4549526422621. The JF suffix denotes the Japanese-market reference and does not indicate the watch’s country of manufacture.
Key Highlights
- Large, easy-to-read positive digital LCD
- Compact 38.4 mm-wide square resin case
- Lightweight 35 g construction
- Approximately 10-year battery life
- World time for 48 cities across 29 time zones
- 1/100-second stopwatch with five-second auto-start
- 24-hour countdown timer with auto-repeat
- Three multi-function alarms
- Flash-alert function
- Amber LED backlight with selectable afterglow duration
- 5-bar water resistance
- Japanese Domestic Market reference
Product Specifications
| Brand / Collection | CASIO Collection |
|---|---|
| Series | STANDARD |
| Model | W-221H-1AJF |
| Base Reference | W-221H-1A |
| Market | Japanese Domestic Market |
| Watch Type | Battery-powered digital quartz watch |
| Display | Positive digital LCD with 12/24-hour format switching |
| Color | Black with a metallic-finished bezel |
| Case Dimensions | 43.7 × 38.4 × 12.2 mm |
| Weight | 35 g |
| Case / Bezel Material | Resin |
| Crystal | Resin glass |
| Band | Black resin band |
| Compatible Wrist Size | 145–215 mm |
| Water Resistance | 5 bar / 50 metres |
| Module | 3585 |
| Power Source | Battery-powered quartz |
| Battery Life | Approximately 10 years |
| Accuracy | ±30 seconds per month |
| World Time | 48 cities across 29 time zones with daylight-saving time setting |
| Stopwatch | 1/100-second resolution, 24-hour capacity, split time and five-second countdown auto-start |
| Countdown Timer | One-minute setting unit, 24-hour maximum, one-second measurement, auto-repeat and time-up pre-alert |
| Alarm | Three multi-function alarms, one with snooze, plus hourly time signal |
| Flash Alert | Flashes with alarms, hourly time signal, timer alerts and stopwatch auto-start |
| Backlight | Amber LED backlight with afterglow and selectable 1.5- or 3-second illumination |
| Calendar | Full auto-calendar |
| Additional Functions | Button operation tone on/off |
| Release | February 2026 |
| JAN Code | 4549526422621 |