The PetSafe Stubborn Dog Stay & Play Wireless Fence Receiver Collar is designed for stubborn or hard-to-train dogs that require a higher level of intensity. It can be used to add another dog or as a replacement collar for the Stay & Play Wireless Fence or the PetSafe Wireless Pet Containment System. This rechargeable collar features 5 levels of static correction plus a tone-only mode for training. Trust PetSafe to help keep your pet healthy, safe and happy in your yard. The collar is suitable for pets weighing 5 lb or more with neck sizes ranging from 6 - 28 in. It is also rechargeable and waterproof, providing up to 3 weeks of use on a single charge. The slim and ergonomic design ensures a comfortable fit for your pet, while the pass-through receiver collar allows you to use any non-metallic, 3/4 in wide strap pet collar. The package includes short and long contact points, making it suitable for pets with both long and short hair. Upgrade your pet's training experience with the PetSafe Stubborn Dog Stay & Play Wireless Fence Receiver Collar. There are 4 collars available. 2 with German Shepard and 2 with Lab on front.