Fixed Gas Detector, For Use With Macurco Control Panel, Gas Detected Carbon Monoxide, Nitrogen Dioxide, Standards cETLus Certified, Includes Manual, Product Type Stand-Alone Detector & Controller, Mounting Location Wall, Number of Relays 2, Sensor Type Electrochemical, Visual Alert Type Digital Display, Display Type Digital, Operating Temperature - Minimum -4 Degrees F, Operating Temperature - Maximum 122 Degrees F, Number of Gases Detected 2, Coverage Area 7,500 sq ft