The sport stopwatch and whistle set is convenient and practical, with excellent texture, and can serve you for a long time without being easily damaged. The craftsmanship can serve you well without breaking easily. This is a very practical sport stopwatch and whistle kit. Features -Color:Assorted Color -Material:ABS -Size:8.00X6.00X2.20cm/3.14X2.36X0.86in -Battery: -This digital stopwatch timer is designed with minimal key control, pressing this external button, you can easily start, stop and reset your timing instead of fiddling with a big clock. -Equipped with multiple functions such as displaying date, and the whistle is also easy to use. -With our stopwatch, you don't need to buy a clock or an alarm clock, also an athlete and a referee timing tool. -Displays a date and time, such as hour, minute, second, week, month, or day, which you can adjust to a 12-hour schedule or a -hour schedule. -This sport stopwatch and whistle kit is manufactured with professional technology to ensure the product can work for a long time. Package list: 1 x Stopwatch 1 x Whistle