B640WB-1B

38.9 × 35 × 9.4 mm

49 g

Resin

Adjustable Clasp

Stainless Steel Band

50-meter water resistance

Approx. battery life: 3 years on CR2016

Resin Glass

Black ion plated band

Black IP

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

Hourly time signal

Multi-function alarm

Flash alert Flashes with buzzer that sounds for alarms, hourly time signal

LED backlight Afterglow

LED:Amber

Full auto-calendar (to year 2039)

Accuracy: ±30 seconds per month

12/24-hour format

Regular timekeeping: Hour, minute, second, pm, month, date, day