The Petsafe Stubborn Dog Inground Fence system is an effective way of containing larger or determined dogs within the boundary of your property. A short period of training utilises a combination of sound and static correction to effectively teach your dog to stay within the property. The unit comes with 150 mtrs of wire which will cover aproximately 1/3 of an acre. With the addition of extra wire the system can cover up to 10 acres. The system collar is best suited to larger breeds and features four seperate settings so there is a correction level that is sure to be effective no matter the size of the dog . Local installation available, please contact the store.