Large control buttons and extreme lightweight, (31g), make this stopwatch comfortable to hold and use. Times to 24 hours with a resolution of 0.01 second for 30 minutes and 1 second thereafter. Also has a split interval function. A beep makes it clear that contact has been made when any button is depressed. Extra features also shown on the LCD display are: an alarm clock with a choice of 12/24 hour formats, and a calendar which displays the date and day of the week. There is even an hourly chime option. Dimensions: 2 5/8"" x 2 3/16"" x 3/4"". Includes neckcord, instructions and button cell battery.

Includes a certificate with an individual serial number indicating instrument traceability to standards provided by NIST (National Institute of Standards and Technology)