Sentry Invisible Perimeter System

The Care Trak Perimeter System establishes an invisible boundary around your home that will alert you if your loved one leaves the yard! The monitored area is adjustable by the turn of a knob and there is no installation required and no buried wires. The unit can be operated on batteries for camping and hiking trips. As long as your loved one wearing a Care Trak transmitter stays within the boundary, nothing alarms. During the day you can expand the area to give your child freedom to play outside and have a good time. At bedtime, you adjust the perimetered area in close, so if your child leaves in the middle of the night, the alarm will sound quicker. For areas without electric current, the unit operates on "AAA" batteries. The Care Trak Mobile Locater is included with this unit.