Water Detection System Alarm Unit Dimensions 1.2 in L x 4.1 in W x 2.4 in H Includes Batteries No Maximum Operating Temperature 140 Degrees F Mounting Location Flanges Operating Voltage 12 to 24V AC/DC Detector Type Water Detector and Alarm Power Source Hardwired Sensor Unit Dimensions 2 in W x 0.88 in D x 3 in H Connection Type Form C Relays Current 100 mA Minimum Operating Temperature 32 Degrees F