digital stopwatch - no bells, no whistles, simple basic operation, silent, clear display, on/off, child friendly, aaa batteries (included), black travelwey we took our previous stopwatch, read all the negative customer reviews, and then made changes. more sigificantly we removed all the time, date and alarm functions. many customers complained that these functions served no purpose and just made the stopwatch harder to use. also, the lack of an on/off switch was another irritation amongst customers, so we've added one. finally, we replaced the screwed in button cell battery with two aaa batteries which can be easily installed with the push out battery cover. all in all, you now have a simple, basic, easy to use, no frills, stopwatch.