Both hard andsoft urethane are used for a higher level of shock resistance than ever before. Hard urethane on the outside shuts out external shock. A soft urethane inner protector that surrounds the module has a totally new shape that expands and contract as pressure is applied, which absorbs impact and keeps it from reaching the module. Tough Solar Power Shock Resistant 200M Water Resistant Mud Resistant Full Auto EL Backlight with Afterglow World Time31 times zones (48 cities UTC), city code display, daylight saving onoff 4 Daily alarms and 1 Snooze Alarm Hourly time signal1100 second stopwatchMeasuring capacity: 23:5959.99Measuring mode: Elapsed time, split time, 1st-2nd place timesCountdown TimerMeasuring unit: 1 secondCountdown Range: 24 hoursCountdown start time setting range: 1 minute to 24 hours (1-minute incremants and 1-hour increments) Full auto-calendar (pre-programmed until the year 2099) 1224 hour formats Button operation tone onoff Accuracy: - 15 seconds per month Battery power indicator Power saving function Storage battery: Solar rechargeable battery Approx. battery life: 11 months on full charge (without further exposure to light)