"Accuracy at Normal Temperature: -/+15 Seconds/Month Timekeeping Mode: Hour, Minutes, Seconds, am/pm, Month, Day, Date, 12/24 Hour Format, Auto-Calendar Pre-Programmed to the Year 2039 Alarm Mode: Multi-Function Alarm, Hourly Time Signal Countdown Alarm Mode: Measuring Unit: 1 Second, Input Range: 1 Second to 24 Hours, Auto Repeat Function, Repeat Function Stopwatch Mode: Measuring Units: 1/100 Second (for the first 60 Minutes), 1 Second after 60 Minutes has passed Measuring Capacity: 23 Hours, 59 Minutes, 59 Seconds Measuring Modes: Elapsed Time, Split Time, and Two Finishes Electro-Luminescent Backlight Water Resistant to 200 Meters Battery Type: CR2016 Battery Life: 2 Years with Normal Use 50mm Case Width (Approximately 2"") 16mm Case Thickness (Approximately 5/8"")"