If you are lucky enough to live somewhere that undergoes true season changes, good for you. As you know, it is important to be prepared for each season change in many ways.
Dog containment fences go by several names, such as electric dog fences or radio fences.
Whether wireless or wired, all invisible fences operate under the same concept. When the dog gets close to the edge of the allotted space, he is giving a warning via an audible beep or a vibration.