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ClearStart™ Information · ClearStart™ Instructional Video · Product Safety Data Sheet · ClearStart™ Timer & Watch Instructions · ClearStart™ Analogue Watch Manual. EN User Manual – Go to ronstan.com . RACE TIMER & SAILING WATCHES. TYPICAL DISPLAYS The Clear Start Timer can be worn on the wrist like a watch. Ronstan Analogue Quartz Watch RF4056. For best results, please read the instructions in this booklet carefully before using your watch.1. Put the watch into time mode by pressing the "MODE" button. · 2. Press the "CLEAR" button and hold it down for approximately 2 seconds until the hour display Manual for Ronstan Clear Start Sports Watch. View and download the pdf, find answers to frequently asked questions and read feedback from users.