E-Collar PG-300 Pager Only ReceiverReplacement Receiver for the PG 300 302 Pager Only This pager only receiver will effectively help teach and communicate commands to your dog. The remote trainer pager affects a different part of the dogs brain than electric stimulus, which contracts muscles, the page is more of a mental cue. Most dogs readily accept the newfound ability when a pager gives out signals. Additional Details: This is a replacement component for a lost or damaged pager