PetSafe YardMax Rechargeable In-Ground Fence (Upgrade to 14 Gauge Wire) The Lightweight Three Ounce Collar is Rechargeable and Has a Fit Test and Ready Test to Ensure Proper Fitment on Your Dog Each YardMax Collar has Five Progressive Correction Levels You Set Per Each Dog's Individual Requirement The Only Underground Electric Dog Fence that Allows Your Dog to Get Right Up to the Boundary Wire, Before Getting a Warning/Correction. This Provides the Most Yard Space for Your Pet to Play In. Only Electric Dog Fence Compatible with the PetSafe Pawz Away Indoor and Outdoor Pet Barriers One Year Manufacturer Warranty