Carbon monoxide detector can detect carbon monoxide concentration, observing concentration value all the time. It has quite clear large LCD screen and voice and light alarm indication, making sure that it can detect dangerous gas and inform operators of precautions under adverse situation. It is widely used in petroleum, chemistry, coal mine, metallurgy, paper making, fire- fighting, municipal administration, telecommunication, food, textile and other industries.Features: Large LCD backlight digital and character display for easier reading. Safety indication: regular light flashing and voice indication. When carbon monoxide concentration increases, buzzing voice frequency would also be increased. Excellent audible alarm, low maintenance cost. Support carbon monoxide detection. Solid shell and robust electric characters. Automatically shut off if it is not operated for 10 minutes. Review of MAX and MIN readings, MAX, AVG and Data hold function. Buzzer alarm setup function.Specifications: Main Color: Black Detected Gas: CO in the air Measuring Range: 0-1000ppm Resolution: 1ppm Minimum Reading: 1ppm Basic Error: +/-5%(f.s), +/-10ppm Response Time: 60 seconds Sensor Type: Electrochemical CO sensor Operating Environment: 0-50 degrees Celsius / 32-122 degrees Fahrenheit，10-90%RH Storage Environment: -10-80 degrees Celsius, -14-176 degrees Fahrenheit, 10-75%RH Power: 2 1.5V AAA battery (NOT included) Weight: 104g / 3.67oz Size: 55 29 135mm / 2.16 1.14 5.3in Package Weight: 182g / 6.44oz Package Size: 16.5 8 4cm / 6.5 3.15 1.57inPackage List: 1 Carbon Monoxide Detector 1 User Manual (English)