The WMA-3000 is the next step in the evolution of the driveway alarm. The transmitter operates on one 9-volt battery and is easily mounted on a tree or post near the drive. The transmitter uses a passive infrared (PIR) beam to detect people or vehicles to a distance of up to 80 feet, then sends a radio signal back to the WR-3000 receiver up to 600 feet away*. The transmitter is weather proof and meant for exterior locations. Up to four zones can be monitored with additional transmitters. The transmitters can be programmed so they will each sound a different tone at the receiver. The WR-3000 is the receiver for the WMA-3000 system. The WR-3000 plugs into a standard wall outlet and can be placed on a table or mounted on the wall. When the receiver gets a signal from the transmitter, one of four diff erent tones (Classical, Westminster Chime, Ding Dong, or Whistle) will sound for a few seconds. There is also a volume control, allowing you to set the sound to the desired level. The WR-3000 is equipped with four form “C” relays (one for each zone), and one 12-volt DC output terminal that will activate for several seconds when a signal is received. The receiver can be user-programmed, so the 12-volt DC terminal and one relay will activate for 10 minutes, if this is desired. The tones will still sound for several seconds. *Coverage depends on terrain and anything that might block the signal.