A great tool for use in math, science and physical education activities. User friendly 3-button operation (start/stop, lap and reset) digital timer. Handy size (2"W x 2"H x ½" thick) with easy-to-read display in hours, minutes, seconds, hundredths/seconds. A magnetic back clip holds to metal surfaces; clips to a belt, pocket, or apron and converts to stand. Top right corner hole for hanging cord (not included). Requires one G10-A battery (included). Grades K +.