Start, Stop and Clear with the three simple buttons on these stopwatches! Essential for any classroom. Easy-to-use stopwatches Chunky design is ideal for small hands Simple three button function; green for go, red for stop and yellow for clear Large digital display shows minutes, seconds and 1/1000 seconds Each stopwatch requires one 1.5V button-cell battery, included Stopwatch measures 7cm H Set of six stopwatches Colours vary