Description: This dog fencing system is among the most reliable, cost-efficient pet containment systems available today. A buried wire transmits a harmless radio signal. When you dog approach the boundary, the signal causes the dog’s collar receiver to deliver a warning beep first. If your dog continues closer to the boundary, the system will issue a mild shock. If your dog continues further, the system will issue stronger shocks until your dog returns to within the boundary your have set up. Your dog will naturally seek to avoid correction, and is content staying within established boundaries.  Specifications: 1.Name:Dog Fence System2.Model:W2273.Material:ABS Plastic4.Size of transmitter:10.8cm*12cm*3.5cm  Features: 1.Pulsed Proportional Stimulus - The closer your pet gets to the boundary, the more intense the shock2.Progressive Tone Stimulus - A warning tone will be issued first, then a shock stimulus if your dog continues to move closer to the boundary3.Variable Field Width Control-Allows you to precisely control the width of the signal field4.Speed Detect Anti-Run Through(Effective distance:5M)- The faster your dog is moving, the quicker the higher level of intensity is issued5.Audible and Visual Wire Break Indicator- Should your buried wire ever break,a loud sonic alarm will sound accompanied by a flashing light6.Built-in Lightning Protection- Protects transmitter from power surges caused by lightning strikes7.Low Battery Indicator- When the light on the collar is green, it is working properly. Red means time to replace the battery8.Multiple Collar Operation-Add as many collars as you like to contain as many animals you have.There is no limit to the number of collars it can control.9.Up to 5000 square meters range. Over 1.2acre10.Collar Max. Circumference: 55cm11.Power adapter plug:EU Plug,US Plug( We will also send you a free plug adapter according to your country)12.New waterproof funtion,most reliable  How to install the system: Design your containment area and calculate the amount of wire neededInstall the wall transmitterLay out the perimeter wireConnect the perimeter wire to the wall transmitterVerify transmitter is functioning without problemSet up the receiver and then, test the containment system and adjust the field widthInstall the boundary wire and training flagsFit collars to your dogs and train your dogs. Then you can enjoy with the trained dog  Package includes: 1 x Indoor Wall mounted transmitter1 x Power adapter3 x Adjustable receiver collars1 x Boundary wire of 300 meters3 x Extra metal contact points20 x Training flags1 x Test bulb2 x Screws1 x English User Manual