Sonically welded case ensures excellent water resistance. Large 5/8"" high display for good visibility. Counts up to 24 hours with resolution of 0.01 second for the first 40 min. and 1 second resolution thereafter. Has lap function. Also features an alarm clock and a calendar. Button cell battery included. Dim.: 2.9"" x 3.25"" x 3/4"". Warranty 5 years.

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