Portable CO Gas Detector Gas Tester With 0 - 1000ppm Range Carbon Monoxide MeterOOTDTY Features: Small size, lightweight, easy to carry and operate. With low energy consumption and high precision. Stable sensor. Continuously monitor the concentration of CO gas in the surrounding environment. The warning sound and light works when the concentration of CO gas reaches the warning level. Widely used in petroleum, chemical, coal, metallurgy, paper, municipal, telecommunications, food, textile and other industries. Specification: Material: PlasticPackage Size: Approx. 18.5x8.5x5.2cm/7.3x3.3x2inMeasurement Unit: PPMCescription: 0-1000ppmResolution: 1ppmAlarm: sound and light alarmAlarm Point: Low: 35ppm; Medium: 70ppm; High: 200ppmOperating Temperature: 0-50°cOperating Humidity: 15%-90%RH (non-condensing)Power Supply: 3 x 1.5V AAA batteries (not included)Package Included: 1x Carbon Monoxide MeterNote: please allow 1-3cm error due to manual measurement. Pls make sure you don't mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item.