100 Levels Dog Fence Underground &ndash; Dog Shock Fence &ndash; Train all Breeds & Sizes Efficiently &ndash; 300 Meters of 30AWG Fence Wire (0.8 acres) + 2 Rechargeable Collars MULTI-COLLARS: Comes with 2 Collars and supports an UNLIMITED number simultaneously, perfect for families with several pets. 300 METERS OF FENCE WIRE: define an area up to 0.8 acres, perfect for houses with large gardens. 100 ADJUSTABLE LEVELS: safe, precise trigger distance for efficient training of all breeds and sizes. WATER RESISTANT RECHARGEABLE COLLARS: long life without constant battery changing, charge one while using the other.