Hermetically sealed for moisture proof or dust proof installations. Requires no special back box when the all-weather leads are properly spliced to "THW" or equivalent type wire and splices are moisture proof. For indoor or outdoor use.-Main Features- Humidity Accuracy: Not Applicable-- - - - Marketing Information- Hermetically sealed for moisture proof or dust proof installations. Requires no special back box when the all-weather leads are properly spliced to "THW" or equivalent type wire and splices are moisture proof. For indoor or outdoor use.- - - Information- Name:THRMTCH 194F ALL WTHR VERT MNTCategory:Smoke Detector Accessories ?Detection DevicesUPC Code:705020499789 Also known as -Thermotech THRMTCH 194F ALL WTHR VERT MNT - TH-302AW194