BABY-G G-LIDE sports with Tide Graph capabilities go great with surfing and other casual styles. Unique thin-case designs are created based on the G-SHOCK like form of the 90s for a nostalgic retro look. These models always provide tide information, even while in the Timekeeping Mode. Each press of the button at 4 o'clock jumps ahead one hour to let you check future tide conditions. The index is designed to enhance readability. This watch features 1/100 second stopwatch, 12/24 hour format, approx. battery life: 3 years, full auto calendar (pre-programmed to year 2099), button operation tone on/off, countdown timer, measuring unit: 1 second, countdown range: 24 hours, dual time, LED super illuminator, auto LED light (on wrist motion), moon data, 3 multi-function alarms, regular timekeeping, shock resistant, tide graph, module: 5605, size of case/weight: 46.1 x 42.4 x 11.0mm / 37g