Sail Timer, Chronograph, Bezel, Time. The wristop to help you with the perfect start, features a maximum 99 hour sail coutdown timer. Smart repeat and timer lock prevents accidental off-sync. Rotating bezel aids in wind distance direction determination. Audible warning signals and large digits, with independent stopwatch. Dual-time, 3 alarms, backlight. Water resistant to 100ft, user-replaceable battery. Material:Stainless Steel / Elastomer (Also Model: Suunto SS011847310)