There's nothing better than the bond between you and your best friend. The Classic In-Ground Fence™ System will give you peace of mind knowing your dog is safe and secure inside your yard. In-ground fences are a great option if you have a rectangular or uniquely-shaped yard. When you bury your boundary wire, you have the flexibility to fence in a customized area for your dog. We've designed a rechargeable receiver collar with 8 levels of correction. Level 1 is a tone and vibration setting which is helpful for when you're training your dog. The vibration level is also great for pets that are hard of hearing so they can enjoy safely playing outdoors too. Levels 2-8 are adjustable static correction that you can set based on your dog's temperament. his In-Ground Fence™ system comes with 500 feet of boundary wire which lets you secure up to a 1/3-acre yard.