About This Upgraded 4-in-1 Detector: This advanced Natural Gas and Carbeon Monoxide Detector combines sensors for natural gas, carbon monoxide, temperature, and humidity.Featuring robust performance, dual sensors, a dual alarm systenh, and fast response, it offers all-around protection to ensure the safety of your household. Quick Response & Dual Alert System: This RV carbon monoxidedetector is equipped with both visual and audible alarms. When gas levels become daIngerous (CO ≥ 150 PPM, natural gas ≥ 5% LEL), the red light flashes repeatedly, accompanied by a loud alarm (≥ 85 dB). This immediate notification enables you and your family to quickly detect threats, providing essential protection for your safety. Eco-Friendly & Energy-Efficient Design: This plug-in carbon monoxide detector is compatible with AC 110V-220V and operates with a low standby power consumption of ≤ 2W, making it highly energy-efficient. Its durable electronicsensor has a long lifespan, reducing the need for frequent replacements and offeriing an environmentally friendly solution. LCD Display & Versatile Use: This RV carbon monoxide and propane detector features a clear LCD color screen, displaying precise readings for carbon monoxide (0-2000 PPM) and natural gas (0-10% LEL) levels. Its compact size saves spacemaking it ideal for various settings such as homes, hotels, RVs, and cruise shijps. Important Usage Notes: Before using, please remove the protectthive film. After plugging in, allow 180 seconds for the detector to adjust to its ervironment. Press the self-test button to trigger the alarm. Additionally, as the device imay generate heat after powering on, wait 30 minutes for more accurate humidityand temperature readings. Overview Brand : NICGOL Style : GAS/CO-1 Pack Power Source : AC Color : White Product Dimensions : 4.7"D x 1.92"W x 2.05"H Item Weight : 2.88 ounces Alarm : Audible and Visual Operating Humidity : 0-99%(±5%) Upper Temperature Rating : 176 Degrees Fahrenheit Material : ABS