Abstract: A system for training an animal to remain in a predefined area comprising a plurality of distance zones from a central point where the perimeters of the distance zones are measured by the received strength of a radio frequency transmission, comprising a transmitter, a receiver for receiving transmissions, a measurement circuit for establishing a numerical value of the magnitude of a received transmission from the transmitter with respect to each of the zone perimeters, a digital memory for storing numerical values, control logic for converting the magnitude of the received transmission to a numerical value, control logic for comparing the received transmission numerical value with the stored numerical values, an animal control signal generator mounted on the animal for imparting warning sounds and applying physical stimuli, and an actuation circuit responsive to the comparison logic for actuating the signal generator for imparting to produce one or both of the warning sounds or stimuli to the animal dependent