PetSafe Extra Receiver Collar (PIF-275-19) for Pet Safe Wireless Containment System (PIF-300). If you have more than one dog, you will need an extra receiver for each one you want to contain. The wireless dog fence receiver has a beep only mode for training and Five Levels of Programmable Correction. - 5 adjustable levels of correction, plus tone-only mode - Low battery indicator - Waterproof - Fits neck sizes 6 to 28 inches The wireless dog fence receiver collar comes with two sets of probes to ensure the best fit for your dog. The receiver is waterproof and has a low battery indicator light that will blink to let you know it is time to change your battery. The wireless fence receiver has built in over correction protection. The receiver will automatically shut down after 27 seconds if your dog leaves your yard. The receiver is lightweight weighing only 2.5 oz. Not compatible with Invisible Fence Pet Fences or PetSafe Underground Electric Dog Fences. The PetSafe Instant Fence Receiver collar comes complete with collar, short probes for short hair dogs and long probes for long hair dogs. It is compatible only with the PetSafe brand Instant Fence Wireless Pet Containment System. The wireless dog fence receiver is designed to comfortably fit your dog with a curved inside edge. PetSafe Extra Receiver Collar for Wireless Containment System: Extra Collar - Extra Wireless Fence Receiver #PIF-275-19 - Training Collars