"Accuracy at Normal Temperature: +/-30 Seconds/Month Timekeeping: Hours, Minutes, Seconds, am/pm, Day, Date, 12/24 Hour Format, Full Auto-Calendar to the Year 2099, Home City Code, Daylight Savings Time World Time: 48 Cities (29 Time Zones) Stopwatch: 1/100 Second, Measuring Capacity 59:59:99, Measuring Modes: Elapsed Time, Split Time, Two Finishes Countdown Timer: Measuring Unit 1 Second, Input Range 1 Minute to 24 Hours in 1 Minute and 1 Hour Increments Alarms: 5 Daily Alarms; 4 One-Time Alarms and 1 Snooze Alarm; Hourly Time Signal Illumination: Electro-Luminescent Backlight with Selectable Duration Time Button Operation Tone On/Off Battery Type: CR1616 Battery Life: 3 Years with Normal Use 37mm Case Width (Approximately 1 1/2"") 13mm Case Thickness (Approximately 1/2"")"