Abstract: A radio tracking system adapted for domestic pets wearing collars. A transmitting unit slips over the animal's collar, and has accommodation for a variety of collar dimensions. A hand held receiver unit indicates strength of signals sent from the transmitting unit through illumination of a plurality of LED lamps. The receiver is pointed in a variety of directions, until a direction is identified which results in the strongest indicated signal, which illuminates more lamps than are illuminated when the receiver is pointed in other directions. This indicates location of the transmitter, and hence the animal, regardless of distance between the transmitter and receiver. Periodic monitoring of signal strength assures that the owner is successfully tracking the animal. Both transmitter and receiver have their own battery power sources and power switches. The transmitter has a battery power level indicator for ascertaining reliability thereof.