I have a Tritronic multi sport two. Only have to beep the dog. Brought it when S.I.R. were still around, They work good. The remote isn't water proof. Had to buy one batterie, For one of the collars. Bought it off of eBay. Every time I show the dog the collar, It goes nuts, Jumping up and down. It loves going for walks. And when it sees the collar it knows whats going on.