B640WD-1A

The B640WD-1A men's watch is part of Casio's retro collection and is jam-packed with functions. This iconic design features a 39mm stainless steel case and bracelet.

KEY FEATURES 

• 1/100-second stopwatch
• 50-meter water resistance
• Popular retro design
• LED Backlight
• Case / bezel material: Resin
• Adjustable Clasp
• Stainless Steel Band
• Resin Glass
• 50-meter water resistance
• LED Backligh: Afterglow
• Flash alert: Flashes with buzzer that sounds for alarms, hourly time signal
• 1/100-second stopwatch
• Measuring capacity: 00'00"00~59'59"99 (for the first 60 minutes) 1:00'00~23:59'59 (after 60 minutes)
• Measuring unit: 1/100 second (for the first 60 minutes)1 second (after 60 minutes)
• Measuring modes: Elapsed time, split time, 1st-2nd place times
• Countdown timer
• Measuring unit: 1 second
• Countdown range: 24 hours
• Countdown start time setting range: 1 second to 24 hours (1-second increments, 1-minute increments and 1-hour increments)
• Other: Auto-repeat
• Multi-function alarm
• Hourly time signal
• Full auto-calendar (to year 2039)
• 12/24-hour format
• Regular timekeeping: Hour, minute, second, pm, month, date, day
• Accuracy: ±30 seconds per month
• Approx. battery life: 3 years on CR2016
• Size of case : 38.9×35×9.4mm
• Total weight : 49g