<p>Features: </p> <p> 1. Shutdown function: power can be turned off and the clock does not need to be reset (most stopwatches on the market currently do not have a shutdown function).2. Key mute function: It can be muted and used under quiet situations. </p> <p> 3. Time and calendar function: display year, month, day, hour, minute, second, week, 12\/24 hour system optional. </p> <p> 4. Stopwatch function: 3 rows display, segmented memory storage, precise value up to 1\/100 seconds, the longest time is 9 hours 59 minutes 59 seconds, </p> <p> 5. The fastest, slowest, and average value can be viewed. When searching memory data, you can check up and down. Each function is easy to use. </p> <p> 6. Countdown function: It can set the countdown function and times counting function. The longest countdown time is 9 hours, 59 minutes and 59 seconds. </p> <p> 7. Daily alarm clock function: can quickly turn on\/off the alarm clock. </p> <p> 8. Metronome function: beat frequency can be selected 5 times\/minute- 320 times\/minute (multiple of 5 times) and has times counting function </p> <p> </p> <p> </p> <p> Specifications: </p> <p> Model: YS810\/ YS830\/ YS860\/ YS8100 </p> <p> Color: white\/ black </p> <p> Display: 3 rows display of 10\/30\/60\/100 tracks </p> <p> Material: ABS plastic shell </p> <p> Battery: built-in CR2032 button battery </p> <p> Display size: 35 x 23.5mm\/1.38 x 0.93\</p>