Features: The CO detectors delivers precise 0 to 500PPM gas monitoring with ±10% accuracy, featuring immediate LED displays for CO concentration, temperature, and humidity alongside double light sound alarms. Its very thin 68mm circular design integrates a magnetic mounting system, Type C fast charging 1200mAh battery, and easy carry lanyard for flexible placement in kitchens or outdoor setups. Ideal for homeowners, campers, and travel search reliable safety solution , this detectors ensures defense against hazardous CO levels. protect kitchens, hotel , camping tents, or mobile homes with its 5 day continuous operation and auto alerts start at 50PPM CO concentration. Engineered to JJG915 2008 standards, this 2.7oz detectors combines professional gas analysis with a smooth , space saving profile for easy indoor/outdoor deployment. Specifications: Material: Metal + Plastic Size: about 68x68mm/3x3inch Package Includes: 1xCarbon Monoxide detectors note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the differences between different monitors, the picture may not reflect the actual colorful of the item.