we have a garmin 200 somthing and it works great. the great plus side, is that you can plug it into a sled via the 12v outlet, plus you can use it in the car, plus it logs your top speed, avg speed, mpg, stopped time, traveled distance, and you can download icons, and you can get trail maps i believe and even lakes and rivers are detailed with depth and such. the thing i like about ours, is that you can even put your SD memory card into it to look at photos, say from a trail camera