Forerunner® 255S Music TUNE YOUR TRAINING Add a beat to your step. Get the training and recovery insights you need to run at a higher level — plus music to motivate you along the way. - Get an overview of your sleep, HRV status and daily workout with morning report. - Charge less, train more with up to 12 days of battery life in smartwatch mode and up to 26 hours in GPS mode. - Push your limits with a built-in triathlon feature and 30+ activity profiles. - Plan your strategy with daily suggested workouts, course details and more on the race widget. - Utilize a full suite of advanced metrics and training tools to reach your goals.