Two basic types of pet containment systems are used: the underground fence, and the wireless fence for the purpose of maintaining safe boundary for their pet dogs. It saves the cost of constructing building and provides reliable security.

Underground fence system also involved high cost of building a physical barrier but wireless fence is the cost effective solution. The underground containment system has the components of a receiver collar and wire attached with transmitter. 

This type of transmitter named as spy transmitter is used by many intelligence agencies for the detective tasks. These transmitters attached with collar and wire is generally buried in ground. The major advantage of this transmitter is that you can set the boundary range in its transmitting system that gives you electric outlet to the prescribed area. 

Spy transmitter need hard labor of many hours for their adjustment in the ground. Detective agents with spy equipments are well trained and they can easily adjust them in ground in short time. The process of fitting of this transmitter is very simple. You have to dig up hole and sets it to the specific depth, then you need to the both ends of wire at same point that are attached to transmitter.

Sometimes it becomes very tough to adjust audio transmitter in the ground because of the nature of ground. If you are fitting transmitter in hard ground, you need extra labor for it. Sometimes this underground system can be affected because of storms and we need additional equipment for the repairing of these transmitter.