Casio Mens A178WA-1AUDF Illuminator Retro Digital Watch Features: - 10 Year Battery - Water Resistant - LED Light with Afterglow - Dual Time - Muli-function Alarm with Snooze - 1/100 second digital stopwatch - Measuring capacity: 23:59'59.99" - Measuring modes: Elapsed time, split time, 1st-2nd place times - Hourly Time Signal - Auto Calendar (pre-programmed until the year 2099) - Accuracy: +/-30 seconds per month - Battery CR2025 - Approx. battery life: 10 years - Module 2519/3234 Specifications: - Size of case: 39.5mm x 32.5mm x 9.8mm - Total weight: 52g