With the ITI Door/Window Sensor, alarm systems can be easily installed that provide the highest level of intruder protection available for a home or business. These sensors monitor doors, windows, cabinets, or anything that opens and closes. When used with a state-of-the-art ITI control panel, the movements detected by the Door/Window Sensor result in an alarm. The ITI Door/Window Sensor provides years of trouble-free operation. The advanced circuit technology makes this sensor extremely efficient and reliable. The low current draw, coupled with a high-capacity lithium battery, means and extrodinary 10 years between changes when sensors are used on windows and low traffic openings. High traffic areas typically result in a 5 to 8 year life expectancy.