Our design team developed this watch for everyday use and to help you improve your interval training performances.Time your workoutsWith a stopwatch function that's accurate to 1/100th second and lap timer, you can measure your performances and progress.Record your sessionsThe 5 last sessions carried out with the stopwatch will be saved in the history mode. There, you can consult all the lap times you have measured.Improve your performance with the interval training modeYou can configure your own training sessions directly via the watch.And personalise your progress to suit your goals! 5 configuration phases available (warm-up, action, rest, number of repetitions and sets, time between sets and recovery time). For example: - 20' warm-up - 8 repetitions 30 sec action/30 sec recovery - 2 sets - 2' rest between sets - 10' recovery at end of workoutEnjoy your watch in all environments with the waterproof index of 5 ATM (50 metres).Keep your watch on as you swim along the surface or have a shower after your exertions, it's waterproofed to 5 ATM and has buttons that work underwater.Easy to change strap.Change your strap easily, no tools required.Choose your languageChoose between 4 languages:French, English, Spanish or Italian.Dimensions and weightCASE Diameter:35mm Thickness:10mm STRAP Length = 205mm Width = 16mm WEIGHT = 24gBattery lifeThe product has a battery life of 2 years with the original batterySpare partsStraps available on our website Batteries (CR2016)Are you looking for a watch for daily use and training?The W500S is ideal for all your activities thanks to its water resistance, backlighting, alarm and training mode Parameter measurement Enjoy the stopwatch and its history, backlighting, alarm and date. Coaching Enjoy the interval mode with 5 customisable phases. Waterproof Waterproof index of 5 ATM (50 m) and buttons for use underwater. Customisation Personalise your watch: select your strap colour (extra option)! Visibility Better visibility thanks to the screen quality and display font. Ease of use Easy to navigate and adjust the watch settings. Easy assembly / dismantling Change your strap easily with the standard system, no tools required Our design team developed this watch for everyday use and to help you improve your interval training performances.