This Forerunner 645 Music was bought as an upgrade after an injury (that caused me to sell my last Garmin watch) that was thought to be healed reoccurred and now prevents me from running, so I don't see much point in keeping the watch despite its many incredible features when others could use it. Below I've listed a few features copied from the Garmin website, although it doesn't cover nearly enough of the endless amazing features it actually has. The watch is like new. Since these photos I've bought a $25 tempered glass screen protector which means this is very durable, and neither this nor the watch face have any marks and are clear (although the screen protector has a bit of dust that's caused a small air bubble underneath it, but just take it off if it bothers you. Doesn't affect it at all). I don't know how old this watch is. For more information check the website or ask me;

Easily download up to 500 songs to your watch, and connect with Bluetooth® headphones (sold separately) for phone-free listeningSyncs music from select streaming services for offline listening¹Garmin Pay™ contactless payment solution² lets you make convenient payments with your watch, so you can leave your cash and cards at homeProvides advanced running dynamics³, including ground contact time balance, stride length, vertical ratio and moreUses wrist-based heart rate4 to offer performance monitoring features, including evaluating your current training statusBattery life5: up to 7 days in smartwatch mode; 5 hours in GPS mode with music