Professional Sports Stopwatch Digital Stopwatch with Countdown Timer 0.001 Seconds Timing for Running for TrainingOOTDTYComs: there are 5 kinds, 10/30/60/100/160 songs, choosing your own. Shutdown function: can be turned off to save electricity, the clock does not need to reset. Button mute function: can be muted, meet with the use of a silent link. Time calendar function: year display, month, day, hour, minute, second, week, 12/24 hour system is optional. Stopwatch function: three rows display the track 10/30/60/100/120, section memory, accurate value up to 1/100 seconds of time, longest time 9 hours 59 minutes 59 seconds, can display the fastest, slowest, average value, download memory data can be searched up and down, each function is convenient to use. You can set a countdown and count the number of functions, the longest countdown 9 hours 59 minutes 59 seconds, and count the number of functions. Daily Alarm Function: You can quickly turn on/off the daily alarm clock. Metronome power supply: the metronome frequency can be selected 5 times/min-320 times/min (5 times several times) and the counting time function. Specification: Material: PlasticSize: 80x68x1 3mm/ 3.15x2.68x0.51 inchBattery: CR2032 Button BatteryPackage Included: 1x Digital Stopwatch (Battery Included)Note: Please allow 1-3cm error due to manual measurement. Pls make sure you don't mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item.