The IQ Motion is designed to be your last line of defense. If an intruder manages to get past your other sensors, he cannot escape the IQ motion! Programmed to detect infrared heat in bodies over 40lbs. Typically installed pointing AWAY from windows (to reduce false alarms) the IQ Motion has a range up to 35 feet* The IQ Motion can be installed two different ways: to cover an entire room from floor to ceiling or in a "pet sensitive" position, allowing animals under 40lbs to pass under the beams without triggering the alarm.