We love the BackTrack units when we want a simple, reliable device that will get us back to our truck when hunting a new location, regardless of the conditions. It's simple as turn the unit on and punch a button to mark your truck, and go hunting. When you need to return the BackTrack will provide an arrow back to your vehicle and the distance. Save up to three locations that can be changed anytime. Dimensions are 3.25"x 2.1"x.75"
The BackTrack 5 operates the same, but let's you save up to five locations. In addition, it provides time, temperature, altitude, and longitude and latitude coordinates. Also comes with a sturdy carabineer to secure to your gear. Dimensions are 3.5"x2.3"x.88".