From G-SHOCK, the watches that are ever evolving in pursuit of toughness, this model uses the metal materials of the square-design 5600 series. The use of a resin material inside the case and a hard stainless steel material for the bezel cover creates a high-quality feel while maintaining a lightweight and comfortable fit. The use of an inverted LCD also achieves a more chic finish. While maintaining concepts inherited from the first generation, the 5600 series has been refined to pursue watch quality and evolve the exterior and wearability. SPECIFICATIONS: Shock resistant 200M Water Resistant Electro-luminescent backlight Afterglow Flash alert Flashes with buzzer that sounds for alarms, hourly time signals 1/100-second stopwatch Measuring capacity 00'0000~59'59'99 (for the first 60 minutes) 1:00'00~23:59'59 (after 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 increment, 1 minute increments and 1-hour increments) Other: auto-repeat Multi-fuction alarm Hourly time signal Full auto calendar (to year 2099) 12/24-hour format Regular timekeeping: Hour, minute, second, pm, month, date, day Accuracy: +_15 seconds per month Approx. battery life 2 years oc CR2016 Module 3229 Size of case / total weight 49.6 X 43.2 X 12.9 mm / 73g