Dogtra E-Fence 3500 In Ground Fence...

RANGE: The E-FENCE 3500 system comes with 500 feet of 20 gauge wire and additional wire can also be purchased to cover up to 40 acres. It’s an effective underground containment system that allows your dog the freedom to run around whilst also being secure on your property.
SIGNAL FIELD WIDTH: Adjust the width of the distance from the boundary wire that the receiver will activate. You’ll be able to keep watch over the area that your dog is in and provide either a shorter or longer field width for your dog to be in.
FILTERING SYSTEM: The E-FENCE 3500 comes with an advanced filtering system to keep it operating properly. It prevents outdoor electrical sources from unintentionally activating the fence, so You’ll be able to make certain that the only source activating it’s the transmitter.
PAGER & CORRECTION MODE: This underground containment system comes with the option to choose between two types of modes. The Pager Only mode provides a HPP (High-Performance Pager) vibration, which offers a clear vibration to alert dogs whilst near the boundary. The Pager/Correction mode provides both a vibration followed by a correction when the dog approaches the boundary area.
WIRE BREAKAGE ALERT: This transmitter is built with a boundary wire continuity light to alert you of wire breakage. If something causes your E-FENCE 3500 wire to break or disconnect, then the light automatically turns off and a warning beep alerts you of the issue.