Case / Bezel Material: Resin Resin Band Mineral Glass 200-meter Water Resistance LED Light Selectable Illumination Duration (1.5 seconds or 3 seconds), Afterglow Multi TimeX4 Individual Cities) World Time 31 Time ZonesX48Xities + Coordinated universal time), daylight savings on/off, home city/world time city swap - 1/100-second stopwatch Measuring capacity: 23' 59.99" Measuring methods: elapsed time, split time, first time Countdown timer Measuring unit: 1/10 second Countdown range:X4 hours Countdown start time setting range: 1 second toX4 hours (1-second increments, 1-minute increments and 1-hour increments) 5 Daily or one-time alarmourly time indication Full auto-calendar (up to year 20999999) 12X4-hour format Button operation Tone on/off Regular timekeeping: hour, minute, second, pm, month, date, day Accuracy: 30 seconds per month approx.Battery life: 10 years on CR2025 Case size: 50.5X 5X4X13.5net weight: 6X