Cabela's has the best selection.
The one I had had 6 different levels of "Stimulation" controllable by the remote.
So that the "Level of Correction" could be applied to the incident.
Chasing a Kid on a bike at full speed (4-5)vs.
Something small, like getting into something in the house (1-2)
3 things I learned over the years.
The correction is instant , Timed with the use of the word "NO" (as in, NO,bzzzt,done)
Very effective. You don't even have to be in the same room.
[b]DO NOT[/b] let the dog see you use the remote!!!!!!!
Especially do not Punish the dog and point the remote at him\her.
The dog will quickly learn when you do and do not have it!!! Surprisingly fast!!!!!!!
Also try to get a kit with a dummy collar.
The dog will know when it's not wearing the collar, but will not be wise as to which collar it's wearing while batteries are charging ect.
Get an extra set of the batteries. Whatever type it takes you will not likely find replacements locally. And if Cabela's changes the model you are sol if you didn't.
Yes they are expensive but the first time you have 1 set die on you in the middle of something, you will want your spares.
Get a good unit.
It will last and they [b]are[/b] used and abused on the dog.
The cheap ones lack range of use more than anything.
Particularly when the batteries are dying.
Hope this helps,
Del [:)]