Features: This portable USB CO detector features a compact design for easy car mounting and backpack carry, with USB charging via car ports or power banks, and detects multiple gas like CO, CH4 for enhanced safety. Equipped with a high resolution display for real time concentration readings, an fast sound light alarm for over limit alerts, and high sensitivity sensors in strong ABS component for precise monitoring. Ideal for drives , homeowners, and travelers who prioritize environmental safety during commutes, home activities, or outdoor activity . Designed for versatile use in cars to monitor exhaust fumes, at home for gas leaks, or while camping, ensuring defense in confined spaces. With its stable gas detection capabilities and user friendly interfaces, this portable gas analyzers provides continuous security against hazardous exposure. Specifications: Component : ABS Dimensions: about 75x55x21mm/3x2.2x0.83inch Power supply: USB direct plugs power supply Measuring ranges: 0-500ppm Measurement object: carbon monoxide methane Measurement accuracy: 1ppm electric : 5(v) Package Includes: 1xCarbon Monoxide Detector 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 difference between different monitors, the picture may not reflect the actual color of the item.