BackTrack Point-5 functions similarly to the other BackTrack products, but has some additional features for your outdoor adventure which include: a digital compass that also shows you your latitude and longitude coordinates; the current time, temperature, and altitude, as well as the ability to mark and store up to 5 locations. It is also small enough to stow inside your pack, briefcase or purse. And still easy as 1-2-3... Mark it. Leave it. Get back!