Because I hunt with an older fellow who bought a Garmin unit and now two years later still has not figured out how to use it and for those who only need to know where your dog is, how fast it's traveling, and when it's pointed, the TEK1 from Sportdog works as good as anything on the market. I'm in no way putting down the Garmin product but I do find the TEK1 is easier to figure out how to use, works fine, and is less expensive.