Counts in 1/100 second intervals for the first 30 minutes and then in 1 second increments. Split time, total time and lap time. Measures up to 9 hours, 59 minutes and 59 seconds. Displays hour, minute, second, year, month, day, week and auto calendar. Alarm and snooze function. Battery included. Uses SR44 battery (item code 52705). Colours may vary. Available each or as a set of 15.