Enclosure, Indoor, Outdoor, Color Clear, Material Polycarbonate, Mounting Surface, Width 11 7/8 in, Depth 12 in, Height 4 7/8 in, For Use With Wide Range of Devices, Components and Sensitive Units, Operating Temp. -40 Degrees to 250 Degrees F, Rating NEMA 4X, Features Enclosure Designed to Maintain A Temperature Above Freezing, Operates on 12, 165 or 24 Volts and Has Three Thermostats, Allows Protected Unit to Be Clearly Seen and Quickly Identified, Includes Heater, Thumb Lock