SportDOG 100-Acre In-Ground Pet Fence System, SDF-100A (Upgrade to 14 Gauge Wire) 1000 Feet of 14 Gauge Wire (Best Dog Fence Gauge) - Covers One Acre Wire Can be Buried or Run Above Ground and Secured Down With Landscape/Yard Staples Collar Runs on Standard 9 Volt Battery Available at Any Store Collar is Waterproof and Has A Vibration Warning Feature Two Year Manufacturer Warranty