LED backlight (Super Illuminator) Auto light switch selectable illumination duration afterglow Flashes with buzzer that sounds for alarms hourly time signal Multi Time (4 different cities) Measuring modes Elapsed time split time 1st-2nd place times Countdown timer Measuring unit 110 second Countdown start time setting range 1 second to 24 hours (1-second increments 1-minute increments & 1-hour increments) 5 daily or one-time alarms Hourly time signal Full auto-calendar (to year 2099) 1224-hour format Button operation tone onoff Digital Hour minute second pm month date day Accuracy 15 seconds per month Approx battery life 7 years on CR2025 Size of case 55 512 174 mm Total weight 72 g LEDWhite