Parameter measurement 1/100s stopwatch, backlight, alarm, date Coaching Countdown with 4 separate times to programme your training sessions Durability Reinforced, shock-resistant casing. Waterproof For practising all water sports (10ATM/100 m). Button can be used under water Customisation Choose the strap colour to customise your watch (option). Water resistance Resistant to swimming pool water (chlorine), sea water (salt) and sweat. Easy assembly / dismantling Change your strap easily with the exclusive slide system. No tools required. Ease of use Easy to adjust using the icons on the screen.