We are interested in using both an invisible fence and a bark collar with our new dog. It seems a bit inconvenient for both him and me if he has to wear two separate collars for this. Do products exist that perform both functions at the same time?
Please, please do not buy either of these products. They are illegal in many countries and are widely accepted as problematic by behavioural experts worldwide. They can cause a lot of suffering and will not keep your dog either quiet or safe reliably.
If you are going to use them appropriately and work with your dog to ensure that he understands borders and does not bark excessively, then you simply do not need either of them. Just train the dog, he is an intelligent animal, not a device: he doesn't require a remote control and will not benefit from the use of one.
The fact that both are available and there are people who use them does not make them a good idea.
Please see : http://www.apbc.org.uk/articles/shockcollars for more information and other approaches that are humane, work better and are less likely to end up with a traumatised dog biting someone.
I installed an invisible fence 3 months ago and placed flags all around the border about 10' apart. It took my dog a few vibration warnings from the collar to learn that she shouldnt cross the flags. She hasn't worn the collar since a week after installing the fence and she has never crossed the line since. I trained her every day by walking around the flag border. I just got her a bark collar and hoping she will learn just as quickly so she won't have to wear it.