Motion Alert Sensor Transmitter, DCMT-2500
The DCMT-2500 is a passive infrared wireless motion detector with a ½ mile* radio range. The DCMT-2500 sensor operates on one 9-volt battery (not included). It will detect a person or vehicle from over 50 feet away and send a signal back to the receiver within a ½ mile.
Operating Range: -30°F to 120°F
*Actual range will vary depending on the environment.