Petsafe Wireless containment transmitters. I have fenced in some of my property, therefore I am selling 3 of my 5 petsafe transmitters. I had used them to overlap the wireless fence area and create a larger oval for my dogs. I am keeping 2 of them and the collars. This is the transmitters only. You can either expand on your existing system or buy collars. The transmitters alone sell for $200 at Menards. These are 40.00 each.