The latest in the Optimum Time line-up.
 
Our latest timer is durable and easy to wear but packs all the functionality of our jumbo models. The super soft silicone strap keeps the mid-size display at just the angle you need. With a reinforced plastic case and stainless-steel buckle, this watch is made to last. The OS15 also features our essential sync button, which synchronises your countdown to the race control timer, ensuring you won’t miss the gun.

Features
29mm diameter display size
39mm viewing area
12.5mm digit height
Reinforced plastic case
Soft-touch silicone strap
Black-plated stainless-steel buckle
Water resistant to 5 ATM
Shock resistant construction
Electro-luminescent backlight feature
 
Timer Functions
Normal timekeeping mode (12 or 24 hours)
Countdown & repeat or countdown and up
Pre-programmed 5,4,1,0 ISAF start sequences, or 5 min, 3 min and 1 min programs with audible warning signals (can be silenced if preferred)
Sync button for instant synchronisation if a gun is missed
Count-up from zer