"Accuracy at Normal Temperature: +/-15 Seconds/Month Timekeeping: Hours, Minutes, Seconds, am/pm, Year, Month, Day, Date, 12/24 Hour Time Formats Auto Calendar Pre-Programmed to the Year 2099 Home City Code Daylight Savings Time/Standard Time Dual Time Week Number Number of Days Elapsed from January 1, Number of Days Remaining until December 31 Stopwatch Measuring Unit: 1/1000 Second Measuring Capacity: 59'59.999"" Measuring Modes: Elapsed Time, Lap/Split Time Memory Capacity: Two Elapsed Time Records, each with 100 entries (1 Elapsed Time Entry, 99 Lap/Split Time Entries) Record Data: Elapsed Time, Lap/Split Time, Lap/Split Numbers, Best Lap Time and Number, Measurment Start Month, Day, Time Auto Start 2 Countdown Timers: Measuring Unit: 1 Second Input Range: 1 Second to 99 Hours, 59 Minutes, 59 Seconds Auto-Repeat Timing Alarm: 5 Multi-Function Alarms; 4 One-Time Alarms, One Snooze Alarm (Four Patterns: Daily, Once, Weekend, Weekday), Hourly Time Signal - Start and Stop Time Specifications: Three Patterns (Daily, Weekend & Weekday) World Time: 48 Cities, 28 Time Zones Daylight Savings/Standard Time Illumination: Electro-Luminescent Backlight Auto-Light Switch Button Operation Tone On/Off Flash Alert Auto-Display Battery: CR2025 Battery Life Approximately 5 Years with Normal Use 45mm Case Width (Approximately 1 3/4"") 13mm Case Thickness (Approximately 1/2"")"