The PetSafe PIG00-10777 Stubborn Dog In-Ground Fence is an underground containment system designed for hard-to-train or persistent dogs, providing coverage for up to 1/3 acre with the included 500 feet of wire.

Key Features
* Coverage: Covers up to 1/3 acre out of the box, expandable up to 25 acres with additional boundary wire.
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* Correction Levels: Features a tone-plus-vibration mode and 4 adjustable levels of higher-intensity static correction suited for stubborn pets.
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* Collar Specifications: Waterproof, lightweight receiver collar fits dogs weighing 8 pounds or more with neck sizes from 6 to 28 inches. Uses a 9-volt alkaline battery.
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* Multiple Pets: Supports an unlimited number of pets with the purchase of additional compatible receiver collars.
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* Safety Features: Includes run-through prevention (correction increases if the dog attempts to cross) and over-correction protection (shuts off after 30 seconds).
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System Inclusions
* Transmitter with power adapter and surge protector
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* Waterproof Stubborn Dog receiver collar with a 9V battery
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* 500 feet of boundary wire and 50 training flags
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* Short and long contact points, test light tool, and waterproof splice capsules/connectors