Optimum Time OS 310 WHITE Same As 315 Sailing Watch Series 3 WHITE NEW for 2013

38mm x 20mm display. Viewing angle is adjustable. Boom/mast mount bracket included. Adjustable elastic strap. Water resistant to 5 ATM. Impact resistant construction. Electroluminescent backlight function. Normal time mode (12 hours or 24 hours). ABS case with a diameter of 65mm. If you want a robust timer with an easy-to-read display and excellent sailing capabilities, this is the one for you. 16mm tall numbers in one column display. Pre-programmed to 5, 4, 1, 0 ISAF start sequence or 5 minute, 3 minute, 1 minute programs (can be muted if desired). Countdown & repeat or more than countdown. Counting up from zero The original iconic [Big Yellow Timer] is still the top choice for competitors around the world.