Works well

We've had a 2 collar system for years now, and when we needed to replace one, the customer support was very quick in responding which one was compatible with our system. I'm glad they make their unuts backwards compatible!!

Bought this collar for our new Mastiff puppy after having one for our Pitbull/Border Collie for the past two years. Like the fact that I only need one remote to control both collars.

I got this second collar for my new dog. The Sport Dog system is great as I was able to add the new collar to my existing receiver. The red color is a great look as well. The only down side to having two dogs on the same receiver is I have to adjust the dial for each dog before issuing a correction. For the most part, the vibrate feature is all my dogs need. I mostly use it for when I'm hiking or in the backcountry riding horses as the dogs go far and it's easier to recall with a vibration then calling for them.