Sper Scientific Water-Resistant Stopwatch
Stopwatch counts by 1/100 second for the first 30 minutes, then by the second for up to 24 hours. Units feature split interval function, calendar, alarm clock and hourly chime option. Both measure 2-1/2” x 2” x 1/2” and weigh just 1 oz. 1.5V button-cell battery included.
