Digital watch CASIO B640WC-5AEF — stainless steel case and bracelet, digital display, alarm, stopwatch

CASIO B640WC-5AEF is a digital wristwatch with a stainless steel case and metal bracelet, featuring a clear digital display that shows time, date and secondary functions at a glance. The design combines a compact rectangular case with a brushed metal finish for a straightforward, functional look suitable for everyday wear. Core features include precise timekeeping, an alarm, stopwatch and calendar, all presented through an easy-to-read LCD. The watch is intended for users who need reliable basic digital functions in a durable metal housing and a secure bracelet closure.

Advantages

The stainless steel case and bracelet provide enhanced resistance to daily wear and a cohesive metal appearance that pairs with casual and smart-casual attire. The digital display offers immediate legibility and a simple interface for setting time, alarm and stopwatch. Low maintenance requirements and durable construction make this model practical for routine use. Lightweight dimensions and a slim profile reduce bulk on the wrist while keeping a metal aesthetic.

Suitable for

• Daily timekeeping and scheduling
• Basic sports timing and interval measurement with the stopwatch
• Users seeking a low-maintenance, durable metal watch for work or casual wear
• Anyone who prefers a clear digital display and quick access to alarm and calendar

Key specifications

• Case material: stainless steel
• Bracelet material: stainless steel with clasp closure
• Display type: digital LCD showing hours, minutes, seconds, date and day
• Functions: timekeeping, daily alarm, stopwatch, calendar
• Power source: battery-operated quartz movement
• Form factor: rectangular case with slim profile

How to use

Use the side buttons to navigate the digital modes: press the mode button to cycle between time, alarm, stopwatch and calendar displays. Adjust the time and date by entering the setting mode and using the adjust and start/stop buttons to change values. Activate the alarm and set the desired wake time via the alarm mode; the alarm indicator will show when it is enabled. Start and stop the stopwatch with the dedicated buttons and reset it when needed. Regularly check the battery level and replace it at an authorized service point when the display becomes dim or functions become unreliable.

Usage recommendations

To maintain the stainless steel finish, wipe the case and bracelet with a soft cloth to remove dirt and sweat. Avoid prolonged exposure to strong chemicals or saline water to preserve metal surfaces and movement seals. For accurate timekeeping, have the battery replaced promptly by a qualified technician and avoid opening the case yourself to protect internal components and water resistance features.