EX3010 Large display water resistant digital regatta timer. This starting timer has huge 30 mm digits and a synchronize function in case you missed a signal. Beeps during the last minute every 10 seconds and during the last 10 seconds every second. Sound is on/off switchable. Quick set/reset. Strong casing with Velcro fixing. Replaceable AAA battery. 90 x 76 x 23 mm. Auto shut-off. Note: We also have a timer mounting bracket that allows the timer to be mounted on the Optimist and all other types of boats.