Professional Electronic Digital Stopwatch Multifuction Handheld Training Timer Portable Outdoor Sports Running Chronograph Stop Watch Feature: Stopwatch: 0.01 second accuracy, the longest time is 29 hours 59 minutes 59 seconds. Alarm clock: daily alarm clock can be set, the alarm clock can be turned on or off. Countdown: The longest timer is 29 hours, 59 minutes and 59 seconds, and the reminder time can be set. Cycle time: the longest time is 29 hours 59 minutes and 59 seconds, and the reminder time can be set. Luminous display: with luminous button, press once to light up for 4 seconds. Clock calendar: 24-hour clock, year, month, day and week display. Hourly hour: can be turned on or off. Can be shut down: can be shut down when not in use, and then back on after shutting down, the memory is still. Mute: can turn on or off the sound of the keys. Specification: Model: YS-728L Material: ABS Size: 80*68*18mm Screen size: 33*25mm Function: clock calendar / alarm clock / stopwatch / countdown / sound switch / shutdown function / luminous / 29 hours long timekeeping Accuracy: 0.01 second Battery: CR2032 button battery (included) Note: Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! Please allow 1-2cm measuring deviation due to manual measurement.