GoodPets Dog Wireless Fence System for 1 dog for $31.75

This fecing system is among the most reliable, cost-efficient pet containment systems available today. A buried wire transmits a harmless radio signal. When your dog approaches the boundary ,the signal causes the dog;s collar receiver the deliver a warning beep first. If your dog continues closer to the boundary , the system will issue a mild shock. If your dog continues further, the system will issue stronger shocks until your dog returns to within the boundary your have set up.