Introducing new models for 2019 for the G-SHOCK G-LIDE lineup of watches, which are a favourite choice among the world's top surfers and extreme sports athletes. The base model is the standard round face GLX-6900, and these models come equipped with a digital Tide Graph, which is a must-have function for surfers. The band is imprinted with a striped pattern that resembles a sea snake, to protect the wearer against shark attack. This lineup of genuine sports models is the perfect choice for both real surfers and those who love surf fashions. Shock Resistant Mineral Glass 200-meter water resistance Electro-luminescent backlight Auto light switch, selectable illumination duration (3 seconds or 5 seconds), 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), daylight saving on/off Moon data (moon age of the input data, moon phase graph) Tide graph (tide level for specific date and time) 1/100-second stopwatch (ST1) Measuring capacity: 999:59'59.99'' Measuring modes: Elapsed time, split time, 1st-2nd place times Other: 5-second countdown auto start 1/100-second stopwatch (ST2) Measuring capacity: 999:59'59.99'' 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) Others: Auto-repeat, progress beeper 5 multi-function 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: ±15 seconds per month Approx. battery life: 2 years on CR2025