Features: 2- Color Display ( Blue, Black ) 8-Digit Calculator 300 - page Databank 8 letters and 12 numerals per page 8-digit calculator Constants for addition (+), subtraction (-), multiplication (x) and division ( ) E-data memory 50 World Time 26 time zones, 100 cities Daylight savings time on/off Auto Electro-luminescent backlight with afterglow 1/100 Second Stopwatch Measuring capacity: 23:59 59.99" Measuring mode: elapsed time, split time, 1st-2nd place times Countdown timer vInput range: 1 minute to 24 hours Measuring unit: 1/10 second Auto-repeat function 5 multi-function alarms with snooze Hourly time signal Auto-calendar ( pre-programmed until the year 2039) 12/24- hour formats Battery power indicator Accuracy: +/- 15 seconds per month Approx. battery life: 2 years on CR2016