The collar LED lights are also a great little feature

Excellent battery life and excellent features

No ½ mile (at best) range limit (like my old-fashioned G3).A great full featured GPS besides being an all-in-one training/tracking collarThe tone on the dog collar; in just a couple sessions I trained my dog to come to it

(Garmin's BaseCamp software for downloading birdseye is pretty pathetic, but once it's on the gps it is great)Pretty much any feature you could want in a