Features Detects ring voltage and off hook loop current On/off switches for ring detection and off hook/loop detection Screw terminal connections Selectable ring cadence mode (relay can remain on between rings) Wall mountable with foam tape (included) or screws (not included) Switched 12V DC output (follows relay activation for powering strobe lights, cameras, etc.) One set of (NO) normally open and (NC) normally closed relay contacts provided Disable input, ideal for use with two-button emergency phones (E-1600-20A), will not activate relay on "Info" calls Specifications Power: 120V AC to 12V DC adapter provided Dimensions: 74mm x 53mm x 25mm (2.9" x 2.1" x 1.0") Environmental: -26 degC to 54 degC (-15 degF to 130 degF) with 5% to 95% non-condensing humidity Relay Contact Rating: .5A @ 125V AC/1A @ 30V DC Maximum Current Draw Auxiliary 12V DC Output: 350mA Minimum Loop Current: 15 mA Disable/Info Switch Input: 50mA/80mW maximum Ringer Equivalence: 0.5 A REN Connections: 10 pin screw terminal block