The V800 is a cool GPS heart rate monitor watch with pretty much all the tracking abilities you can think of….and before we go any further, it can still track your heart rate under water. Yes, underwater. This watch is more targeted towards the dedicated athlete who wants little more depth and analysis with their training sessions. The V800 has incredibly smart coaching features that allow you to see how your training is affecting your body, when to rest and when to get going, how your running is improving, as well as motivational feedback after sessions. Your own personal coach! The additional heart rate monitor is yours to set up however you like, from setting minimum and maximum target zones, to displaying where you are so you know how to work towards your potential. On top of already tracking general activity levels, the V800 allows you to input your cycling settings so you can easily select what type of workout you will be doing, then with a quick connect to Polar Flow, see all your data on your smartphone or computer screen. Since the V800 does so much, the battery life is only up to 13 hours in training mode, and depends on your GPS settings too; but like anything is easily rechargeable with a USB cable.