4-in-1 Carbon Monoxide Detector & CO2, Temperature and Humidity Monitor

iToolMax 4-in-1 Portable Gas Detector monitors CO, CO2, temperature and humidity, with an instant 85dB alarm and red warning light. Ideal for homes, RVs and workshops. ✅ 4-in-1 Air Safety Monitoring for CO, CO₂, Temperature & Humidity ✅ Dual Audible & Visual Alerts with an 85dB Alarm and Flashing Red Light ✅ Built-In Flashlight & Flexible Placement—Hang, Mount, or Place ✅ Up to 340 Hours Runtime ✅ Ideal for Homes, RVs, Workshops & Camping