SMJ 8-time stopwatch JS-510 It has the following functions: Stopwatch: displays lap time, split time and current stopwatch reading, Maximum time measurement: up to 10 hours with an accuracy of 1/100 of a second, It has two independent displays: One for measuring stage (lap) time, the other for measuring the total competition time. You can select the functions according to your needs, The first eight sets of lap times and competition times are automatically saved in the stopwatch memory and can be read during or after the measurements are completed, Countdown time: up to 10 hours, Thermometer: displays temperature in degrees Celsius or Fahrenheit, Calendar with alarm function, Dimensions: 85.5 x 64 x 22.2mm The stopwatch has a Polish manual, the stopwatch runs on a CR2032 battery (battery included)