Description 1The product is adopted the quality ABS material for shell, good touch feeling, sturdy and durable. 2With clear LED display screen, easy to read detecting data. 3The device is used for HCHO and TVOC air quality detecting in home. 4Portable design, mini compact size with a cord that easy to carry and take in your pocket. 5Convenient to use. There is a calibration button on the product, marked withAre you worried about the formaldehyde of your newly decorated home Do you know the bad air condition in your car that will cause big harm to you health Do you want a air quality detector meter that can help you analyze the air around your little baby Our new arrived formaldehyde detector will help you about this. Good product at competitive price For the health of all you families, dont miss itFeatures:The product is adopted the quality ABS material for shell, good touch feeling, sturdy and durable. With clear LED display screen, easy to read detecting data. The device is used for HCHO and TVOC air quality detecting in home. Portable design, mini compact size with a cord that easy to carry and take in your pocket. Convenient to use. There is a calibration button on the product, marked with M. Powered by 2 pcs AA batteries (Not included). Specifications:Condition: 100% NewUsage: Home Use HCHO and TVOC Air Quality DetectingShell Material: ABSMain Color: WhiteDetecting Range: 0.000-1.999mg/m3Measurement Accuracy:0.001Storage Temperature: -20~70Working Voltage: 2.4-3.0VPower: AA Battery x 2 (not included)Concentration Unit: mg/m3Collection Method: Diffusion TypeDetecting Temperature: -20~70Size: Approx. 6.3 * 14.2cm / 2.5 * 5.6inThickness: Approx. 2cm / 0.8inPackage Weight: 155gUsage:1. There will be about 200 seconds warm-up after turning on the device, then press the right button and hold for 5 seconds, release after hearing Beep......, then start air test. When formaldehyde concentration is no higher than 0.01, the air quality is good. When formaldehyde concentration is over 0.1mg/m3 and TVOC is over 0.6mg/m3, the formaldehyde is overproof, alarm indicating light will turn from green to red, that suggests to open the door for good ventilation. When formaldehyde concentration is more than 0.3mg/m3, the formaldehyde is overprood seriously, buzzer will give an alarm. We suggest to open the window for good ventilation at once, and pay more attention to formaldehyde test constantly.2. Press on/off switch for 3 seconds for turn on/off the device.3. We suggest to turn off the device immediately after use to save power.Package List:1 * Formaldehyde Detector (exclude battery).