Vehicle Detector, 110VAC DSP-6LP Low Power Multi-voltage Vehicle Microdetector Loop Size - Works on any in-ground inductive loop from 20 to 1200 microH. Indicators - Separate Power and Detect LED's. Sensitivity - Automatic Output Ratings - Single output, 1 amp relay at 30 VDC. Resistive - The relay common, NO, and NC contacts are available.