marevic 4-in-1 Carbon Monoxide & Gas Detectors Plug in, with Real-Time Temperature & Humidity Display, Alarm for Natural Gas, Propane Gas Detector

4-Stage Gas & CO Alerts for Precise Risk Awareness - Detection system with four real-time alert levels: Green – Safe (CO < 50ppm, GAS < 5% LEL); Yellow – Caution (CO 51–100ppm, GAS 5–8% LEL); Orange – Warning (CO 101–150ppm, GAS 8–15% LEL); Red – Danger (CO 150–999ppm, GAS >15% LEL) Dynamic Alarm System – Louder & Faster as Danger Increases - Equipped with a powerful 85dB alarm that intensifies in sound and frequency as gas or CO levels rise, combined with bright LED indicators for rapid alert. Plug & Play – Hassle-Free Installation - No wiring or setup needed. Simply plug it into any standard outlet for immediate protection — ideal for kitchens, boiler rooms, and other high-risk areas. Built-In Temperature & Humidity Monitoring - More than just a gas detector — continuously monitors indoor temperature (14℉–122℉) and humidity (0–95% RH) to support a healthier living environment. 24/7 Dual Sensor Protection – CO + Combustible Gas - Combines carbon monoxide and flammable gas (LPG/Natural Gas) sensors in one unit for full-time, reliable monitoring with fewer false alarms and no need for separate devices.