The Contact Sensor Bobcat™ is a single point module for detecting contact closures such as relays or switches. Specifications: Size: 2.5"L x 1.35"W x 0.6"H 18" Sensor Cable Power: 9-12 Volts AC or DC, 30 mA. I/O: ADNET - 2 Screw Terminals* Power - 2 Screw Terminals* *(up to 14 AWG)