EL Backlight （with Auto Light）
An electro-luminescent panel causes the entire face to glow for easy reading. Auto Light automatically turns on the EL backlight when the watch is tilted towards your face for reading.
Stop function （1/100 - 10HR）
Accurate measurement of elapsed time with the touch of a button. The fraction indicates the unit of measurement, while the time figure indicates the maximum time measurement.
Daily Alarm, Hourly Time Signal
The daily alarm sounds each day at the time you set. The value indicates how many daily alarms are available. The hourly time signal causes the watch to beep every hour on the hour.
3 Years - 1 Battery
One battery will supply your watch with the power it needs for about 3 years.
Full Auto Calendar
Allowances are made automatically for months of different lengths, in case date corrections for leap years are required.
12/24-hour Timekeeping
Times can be displayed in either a 12-hour or 24-hour format.
Spherical Glass
The surface of the glass is rounded.
Resin Band
Water resistance classification （10 bar / 100m）
Perfect for swimming and snorkelling: the watch is water resistant to 10 bar / 100 metres. The metres value does not relate to a diving depth but to the air pressure used in the course of the water resistance test. （ISO 2281）
Accuracy
+/-30 seconds per month
Type of battery
CR2016
Size of case
WS-300.......................46.5 x 41.9 x 13.8 mm / 36 g
WS-300B.......................46.5 x 41.9 x 13.8 mm / 38 g
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