Color: Red Shock resistant (G-SHOCK) Electro-luminescent backlight Auto light switch, selectable illumination duration, afterglow Flash alert Flashes with buzzer that sounds for alarms, hourly time signal, countdown timer time up alarm, countdown timer progress beeper, and stopwatch auto start Low temperature resistant (-20°C) World time 29 time zones (48 cities), city code display, daylight saving on/off 1/100-second dual stopwatches (ST1, ST2) Measuring capacity: 999:59'59.99'' Measuring modes: Elapsed time, split time, 1st-2nd place times Other: Auto start (ST1 only) 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) Others: Auto-repeat, progress beeper Multi-function alarms 5 independent multi-function alarms (4 one-time alarms and 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 Water Resistant: 200 Meter 20 Bar Casio Resin Strap Buckle Clasp Scratch Resistant Mineral Glass Accuracy: +/-15 Sec per month Approximate Battery Life: 3 Years on CR2025 Case Diameter: 46.7 X 43.2 X 12.7 mm (H W D) Weight: 58g Module 3178