I have had this for about 6 months now and the 1 and 2 buttons on the remote do not work. I have changed the batteries in both the remote and the receiver, but still they do not work. However, the 3 and 4 buttons work, but that is WAY too powerful for my Westie-poo. Also if you buy this from amazon it voids the warranty (I wish I knew where that conspicuous disclosure regarding the warranty was...), so I will have to fork out another 100 bucks or so for a new one...