The containment system works by producing a radio signal from the Fence Transmitter through the Boundary Wire. Bury the Boundary Wire to enclose the dog's Boundary Area. Temporarily define the Boundary Area with Boundary Flags for a visual aid in training your dog. Your dog wears a Collar Receiver with Contact Points that touch his neck and, once trained, is allowed to roam freely in the Boundary Area. When your dog reaches the Warning Zone, the Collar Receiver gives a warning beep. If your dog continues into the Stimulation Zone, a safe static stimulation will be delivered through the Contact Points to get his attention until he returns to the Boundary Area.

Containment Mode: 7 levels of static stimulation and Vibration/tone option. Expands to any number of dogs with purchase of Add-A-Dog Collars (SDF-CTR). Expands to 100 acres with purchase of wire and flag kits.

Training Mode: 7 instantly selectable static stimulation levels, Low/medium/high stim ranges, Vibration and tone options. Expands to 3 dogs with purchase of additional Add-A-Dog Collars (SDF-CTR).

Product dimensions: Handheld Transmitter with antenna - 1.7""L X 1.0"W X 5.3"H. Fence Transmitter - 7.4"L X 2.6"W X 9.5"H. Collar Receiver without strap - 3.4"L X 1.4"W X 1.6"H.

Package contents: Collar Receiver on Black 1 Inch Collar Strap, Containment Transmitter, Remote Transmitter, 1,000 Feet of 14-Gauge Wire, 100 Boundary Flags, Charging Adapters, Standard Contain Points, Long Contact Points, Lanyard, Test Light Tool, and Basic Training Manual and DVD.

Features:

• For dogs 10 pounds or larger
• Collar Receiver and Remote Transmitter have rechargeable lithium-ion batteries
• Ability to secure your dog(s) within a set boundary, and remotely train both inside the boundary, at home, and outside the boundary while in the field
• Wire-break Transmitter alarm alerts you to possible problems with the Boundary Wire
• Anti-Linger Feature prevents dog from running down Collar Receiver battery in containment warning zone
• Built-in lightning protection
• Remote Transmitter is DryTek waterproof and submersible to 25 feet