For professional and devoted athletes who want to reach peak performance Measures every training session and 24/7 daily activity Helps you understand your training load and recovery need Tracks your speed, distance and route with integrated GPS Supports multisport training with sport profiles Gives heart rate even in water with a comfortable hybrid transmitter Allows you to plan and analyze your training with the free Polar Flow app and service Compatible with Polar Bluetooth Smart running and cycling and sensors Waterproof to 30 m/100 ft