Polar's RS400 makes getting fit way more fun. It's feature-packed to make your workouts incredibly efficient and includes accurate heart rate readings, up to 99 exercise files, and a personalized fitness test with customizable settings based on intensity. You'll love the interval trainer that guides you through heart rate, pace or distance interval sessions, and Polar's ZonePointer feature which alerts you when a pre-set target zone has been reached. And, you can pour over every detail with Polar's ProTrainer 5 Software for guidance, analysis and creating individual training settings. Plus, with the optional foot pod (sold separately), you can take your running to the next level with speed/pace target zones and summaries, mileage and kilocalorie totals, and target pace alarms.