Summer Surprise ????????? ???? Air Quality Detector,Air Quality Meters Testing Formaldehyde Detector HCHO TVOC PM 2.5 and PM10,Air Quality Pollution Senor for Measuring Indoor Air Quality Detector-Whi

Specifications: Condition: 100% Brand New Usage: Home Use HCHO and TVOC Air Quality Detecting Shell Material: ABS Main Color: White Detecting Range: 0.000-1.999mg/m3 Measurement Accuracy:0.001 Storage Temperature: -20?~70? Working Voltage: 2.4-3.0V Power: AA Battery x 2 (not included) Concentration Unit: mg/m3 Collection Method: Diffusion Type Detecting Temperature: -20?~70? Size: Approx. 6.3 * 14.2cm / 2.5 * 5.6in Thickness: Approx. 2cm / 0.8in Package Weight: 155g Usage: 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).