4-in-1 Natural Gas Leak Detector & Carbon Monoxide Detectors - Carbon Monoxide Detectors Plug in - Natural, Propane, Co & Gas Detector, Temperature & Humidity Detectors for Home, RV (White)Brand: NORJAN Color: White Features: Upgraded 4 in 1 Detector: This advanced Natural Gas and Carbon Monoxide Detector combines sensors for natural gas, carbon monoxide, temperature, and humidity. Featuring robust performance, dual sensors, a dual alarm system, and fast response, it offers all around protection to ensure the safety of your household. Quick Response & Dual Alert System: This RV carbon monoxide detector is equipped with both visual and