DOGTEK EF-4000 Electronic Dog Fence System

THE EF-4000 is an invisible dog fence which enables you to keep one or more dogs safe in complete freedom within a perimeter that YOU define without the need of an ugly containment fence. You will be able to rest assured that an unlimited number of receiver collars can be used within one perimeter to contain as many dogs as you wish safely in the same area. The EF-4000 advanced technology makes it adaptable to any type of terrain: open, wooded, hilly, fenced, unfenced, hot or cold! How does it work? A discrete perimeter wire (up to 2000 feet / 5 acres) is placed on the ground, buried or raised on an existing fence. This wire carries a signal from a small transmitter unit. The dog wears a discrete receiver collar that receives a signal when he approaches the perimeter wire. When your dog first approaches the wire he enters the warning zone and is warned by a beep from the collar. As he gets closer to the wire he enters the correction zone and is corrected by small electrical impulses. As he leaves the area the impulses stop. After a few days, as the dog learns the boundary the electrical impulses can be reduced and the collar used to emit sound beeps only.