PetSafe YardMax Rechargeable In-Ground Pet Fence? 30% More Yard Space ? Covers 1/3-Acre Yard ? Expandable up to 10 Acres ? for Pets 5 lbs. and Up ? from The Parent Company of Invisible Fence Brand SECURE A 1/3 ACRE YARD: Create a safe 1/3-acre play area for your best friend; purchase additional wire to fence in up to a 10-acre yard SAFE PET CORRECTION: The receiver collar has a tone-only mode and 5 levels of safe, static correction that you can adjust based on how your dog responds during training DIY INSTALLATION: This easy, do-it-yourself weekend project lets you create a fence that fits your yard STATIC-FREE REENTRY: Allows your dog to return home without being corrected if he passes the boundary COLLAR FIT: The YardMax Rechargeable Receiver Collar is waterproof and comfortably fits dogs 5 lb and up and adjusts to fit neck sizes 6-28 in; for dogs 6 months and older Three Things To Consider When Purchasing a Pet Fence If your dog is an escape artist or a fence jumper, traditional fences won?t do the trick. The PetSafe Stubborn Dog In-Ground and Stubborn Dog Wireless Fence could be a better solution. For easier to train pups, our Compact Wireless Fence, Classic In-Ground Fence, or YardMax In-Ground fence are great options to protect your pets in their yard. If your yard is more than 3/4" of an acre, we recommend choosing a PetSafe In-Ground Fence. We also recommend In-Ground fences for yards where you may need to customize the boundary shape. Anything smaller than 3/4" acre is easily covered by our Wireless Containment Systems, which create an adjustable circular boundary. Regardless of which containment solution you choose, installation is quick and easy. In-ground fences are typically a weekend project while our Wireless Fences can be set up in just a few hours. When it comes to training your dog, 15 minutes a day for two weeks is all you need to teach them their new boundaries!