Casio Stl-s110h-1bef * Tough Solar,5 Alarms,water Resist Wr-100m Imported Tough Solar Power, 100M Water Resistant, LED Light with Afterglow 5 Daily alarms (4 one-time alarms and and 1 Snooze Alarm), Hourly time signal, World Time 1/100 second stopwatch, 2 Countdown Timers (can be used during interval training that alternates between two different paces) Measuring unit: 1 second , Other: Auto-repeat Function (number of repeats settable from 1-10) Full auto-calendar (pre-programmed until the year 2099), Button operation tone on/off, Accuracy:  30 seconds per month Battery level indicator, Module: 3425, Size of case/total weight: 51.4 x 45.4 x 12.7mm / 40.3g