The Casio G-Shock Shock Resistant Tough Solar GAS100-1A Men?s Watch is a shock-resistant men?s watch for guys who are active and like to explore both land and sea. It boasts AM/PM Display that can tell you the date and time in any world time zone you choose. It has 31 Time Zones (48 Cities + UTC) with Button Operation Tone On/Off as well as Hand Shift Feature. To further help you get organized, the G-shock also has a Full Auto-Calendar (To Year 2099). A great blend of analogue and digital display, this G-shock also has a 1/100-Second Stopwatch, a Countdown Timer, Hourly Time Signal and a 5 Daily Alarms.