Boost your fitness performance while listening to your favourite tracks with the tomtom runner 3 cardio music small heart rate monitor with headphones and capture your steps active minutes distance calories burnt and sleep time thanks to 247 activity tracking feature with 3gb of music storage this ultra thin and lightweight gps watch lets you store your playlists and listen to over 500 songs whereas a built in heart rate monitor allows for checking your heart rate on the wrist train in