Vehicle Detector, Includes Relay, Number of Channels 1, Operating Voltage 117V AC, Minimum Loop Inductance 20 uH, Maximum Loop Inductance 2,000 uH, Features 11 Pin Plug-In, Overall Height 2 1/2 in, Overall Length 4 in, Overall Width 2 in, Minimum Operating Temperature -35 Degrees F, Maximum Operating Temperature 165 Degrees F