- Solar powered wireless infrared break beam system that is simple to install and requires no wiring - Break beam sensors are powered by lithium ion batteries that are recharged through the solar panels during the day - Infrared sensing terminals can be mounted up to 300 feet apart and will send a signal back to the DCR-2500 receiver up to half mile away anytime someone passes between the sensors - Will not be activated by any motion outside of the monitored beam - Sensors are not affected by small objects such as falling leaves or birds - Ideal for outdoor applications such as storage lots, lumber yards, car dealerships, etc. - Multiple sensor pairs can be used to send a signal to one receiver if you wish to set up a perimeter