INTELLIGENT DOG TRAINING COLLAR IN-GROUND FENCE SYSTEM Progressive Tone Stimulus: A warning tone will be issued first, then a shock stimulus if your dog continues to move closer to the boundary; Variable Field Width Control: Allow you to precisely control the width of the signal field; Audible and Visual Wire Break Indicators: Should the buried wire ever break, a loud sonic alarm will sound accompanied by a flashing light; Speed Detect Anti-Run through: The faster your dog is moving, the quicker and higher lever of shock is released; Built-in Lightning Protection: Protect transmitter from power surges caused by lightning strikes;