"Shock Resistant 200M Water Resistant EL Backlight with Afterglow 25pg Databank Memory capacity: Up to 25 sets of data, each set including; Name (8 characters) and telephone number (12 digits) Other: Auto-sort World Time 29 time zones (30 cities), city code display, daylight saving on/off Day Counter Automatically counts down the days from the current date to a target date Memory capacity: 5 records (8 characters each) 5 Daily Alarms Hourly Time Signal 1/100 second stopwatch Measuring capacity: 23:5959.99"" Measuring modes: Elapsed time, split time, 1st-2nd place times Countdown Timer Measuring Unit: 1-second Input Range: 1 minute to 24 hours (1-minute increments and 1-hour increments) Full Auto Calendar (pre-programmed until the year 2099) 12/24 Hour Formats Button Operation Tone on/off Accuracy: +/- 30 seconds per month Battery: CR1616 Approx. battery life: 3 years Module 3189/3252 size of case/total weight BG169R 45.9 x 42.6 x 15.4mm / 43g"