From the manufacturer:

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. Relax, help is on the way!

Features (from the manufacurer):

• Designed for stubborn and hard-to-train pets - highest intensity level available
• Four adjustable static correction levels plus tone with vibration only mode
• Ideal for training hearing-impaired dogs
• Includes 500 ft of wire and 50 boundary flags (covers up to 1/3 of an acre)
• 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 included