Garmin has finally introduced music to their GPS running watch! The Garmin Forerunner 645 lets you easily download up to 500 songs to your watch for phone-free listening whilst you go on a run. You can store your own music as well as playlists from some streaming services straight from the wrist. The stainless steel watch also has a 5ATM waterproof rating, Garmin´s Elevate optical heart rate sensor, GPS, GLONASS, an altimeter, compass, gyroscope, accelerometer, thermometer, plus advanced running dynamics and performance monitoring tools. Another cool feature is the contactless payment solution that lets you buy what you need while on the go. As for battery life, it lasts up to 7 days in smartwatch mode, and 5 hours in GPS mode with music.