Fixed Gas Detector, For Use With DVP-120, Gas Detected Carbon Dioxide, Standards cETLus Certified, Includes Manual, Product Type Stand-Alone Detector & Controller, Mounting Location Wall, Number of Relays 2, Sensor Type Infrared, Visual Alert Type Green LED, Display Type Digital, Operating Temperature - Minimum 32 Degrees F, Operating Temperature - Maximum 122 Degrees F, Number of Gases Detected 1, Coverage Area 900 sq ft, Interchangeable Sensors No, NEMA Enclosure Rating Not Rated