The Forcefield Mains MX4 Fencer with 4 Joule output is a high quality fencer with adjustable settings that make it suitable for any fence especially for use on large permanent electric fences. The MX4 was engineered to a high quality and uses microchip technology to allow digital control for you to adjust the pulse on the electric fence. The Forecefield fencer controls will operate the time, frequency and power of the pulse which enables you to maximise the effect of your electric fence. The MX-4 fencer is extremely easy to install and maintain. There is a light up display which makes it easy to read and can be visible from 30 meters away. This display gives you the information you need from effectiveness of your fence and its performance, if the performance is not up to scratch the Forecefield fencer will signal an audible alarm to let you know there is poor performance and low output.