Case / bezel material: Resin Resin Band Mineral Glass Shock Resistant 100-meter water resistance Electro-luminescent backlight Afterglow Data Bank Memory capacity: Up to 25 sets of data, each set including; Name (8 characters) and telephone number (12 digits) Other: Auto-sort World time 29 time zones (48 cities coordinated universal time), daylight saving on/off Day Counter Automatically counts down the days from the current date to a target date. Memory capacity: 5 records (8 characters each) A mark appears on the display to let you know when a target date is reached. 1/100-second stopwatch Measuring capacity: 23:59'59.99'' 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 minute to 24 hours (1-minute increments and 1-hour increments) 5 daily alarms (with 1 snooze alarm) Hourly time signal Full auto-calendar (to year 2099) 12/24-hour format Button operation tone on/off Regular timekeeping Hour, minute, second, pm, month, date, day Accuracy: ±30 seconds per month Battery: CR1616 Size of case : 46.3×43.4×15.8mm Total weight : 45g