《ENHANCED 3 FUNCTIONS》 It has three functions; Digital Timer (Count-Down) / Stopwatch (Count-Up) / Count-Days. It tells you with LED light and beeps when the designated time is up. Operation sound can be muted in public places. You can set up to 199 hours 59 minutes 59 seconds, and counts 1 100th of a second. This is useful for time sensitive games or race competition. This timer has a repeat function. After stopping the alarm sound, the original setting time is displayed. 《EASY TO PUSH THE START / END BUTTONS》 This item is used for many ways to set time, such as exercising, cooking, study, gaming or playing for children. The START / END button is large enough for anyone to push and see. LED display has a slight angle to see easier anytime. 《CALENDAR SETTING - COUNT-DAYS》 Set your important days, such as Wedding, Baby Birth, Event, Vacation, Project, Christmas or Your Retirement Day ... You won't forget!! The calendar function counts until year of 2050. 《MUTE & LOCK FUNCTION》 Easy to activate the lock to prevent any errors or unexpected operations especially when carrying the timer in your pocket or bag. Volume has 3 selections, HIGH / LOW / SILENT. Silent mode is useful in quiet environments. 《PRODUCT DETAILS》 Maximum setting time: 199 hours 59 minutes 59 seconds. Size: 2.4"(60mm) X 3.1"(80mm) X 0.9"(23mm). Weight:2 oz. 2 X AAA batteries operated. Package contains 2 of AAA batteries.