Hey Guys
Thinking about getting a family dog (I never had a dog before) - a lab kinda mix mutt from the pound -  and wanted to ask about electric fences.  I would want to set up an electric fence on my property so the dog can run (I live on 2 wooded acres)  - but want the kind where I dont have to bury a wire -  I want the kind that has a transmitter of some kind in the garage (lets say) and the electro ? field it emits works with a collar that the dog wears.  I see different kinds advertised for dog training purposes also. Cabela, LL Bean, etc.  
Anybody have or use one?  Do they work?  On a hill?  Good enough to rely on - - as in - let the dog out into the yard and not worry he will "escape"?  
Thanks for your thoughts.  
Russ