Our underground, in-ground, hidden or invisible dog fence collars let pet owners provide a safe area for their dogs without the need for unsightly, undependable above ground fences. All of these collars are designed to be used with their currant or existing installed fencing system. They’re easy to use and dependable: simply attach one of these electronic dog fence collars around your pet’s neck and follow their training instructions. The digital receiver on the collar will emit an audible alert tone and or vibration than pet safe stimulation if your pet tries to leave the protected area. This teaches your pet to remain within the area while protecting them from harm.