In-Ground Stubborn Dog Fence by PetSafe

PetSafe says:

He may be stubborn, but that doesn’t mean he can’t be kept safe and secure. To help manage your strong-willed pal, this in-ground fence comes equipped with five adjustable levels of correction, including a tone-only plus vibration mode. The adjustable collar is especially designed for hard-to-train dogs of every size. Relax, help is on the way!

Product Features

    * Designed for stubborn and hard-to-train pets - highest intensity level available
    * Four adjustable static correction levels plus tone with vibration only mode for training
    * Warning tone with pet-pager vibration is ideal for training hearing-impaired dogs
    * Includes 500 ft of wire and 50 boundary flags (covers up to 1/3 of an acre)
    * Transmitter covers up to 10 acres (additional wire and flag kits required)
    * Waterproof receiver with low-battery indicator
    * Works with multiple pets (additional receiver collars required)
    * Operating and training guide/Installation DVD