This new pet containment system will train your pet to stay within your chosen boundaries for an area of up to 25 acres. The collar unit has an electronic circuit triggered by a microphone which, when in contact with the fence, activates the release of citronella under the dog's nose. The dog links the scent of citronella to the forbidden area by instrumental conditioning without use of electric shocks. The wire is buried underground so there are no unsightly wires spoiling the landscape. The kit comes complete with all necessary components, instruction manual and video. Additional collars and spray will be available separately shortly.