Pecute&reg; Safety Pet Waterproof Train Control Device Collar Hidden Underground Yard Dog Electric Fencing Fence System-Christmas Gift This hidden fencing system is one of the most reliable and cost-efficient pet training systems in the world. A harmless radio signal will trainsmit to your dogs when they approach to the set-up boundary with the buried wire. The collar receiver which is tied around your dogs' neck will alarm a warning beep first when they approach boundary. 1. Pulsed Proportional Stimulus--The closer your dog gets to the boundary, the more intense the shock will be.2. Progressive Tone Stimulus--A warning tone will be issued first, then a shock stimulus if your dog continues to move closer to the boundary. 3. Variable Field Width Control--Allows you to precisely control the width of the signal field.4. Audible and Visual Wire Break Indicators--Should your buried wire ever break, a loud sonic alarm will sound accompanied by a flashing light. 5.Speed Detect Anti-Run through--The faster your dog is moving, the quicker the higher level of intensity is issued.6. Built-in Lightining Protection--Protects transmitter from power surges caused by lightning stikes. 7. Multiple Collar Operation-- Add as many collars as you like to contain as many animals as you have. There is no limit to the number of collars it can control; Area Covered--Up to 5000 square meter range (over 1.2 acre).8. Low Battery Consumption, quick disconnect terminals.