This air quality monitor has the function of measuring PM2.5, PM10, counting of dust particles, temperature and humidity. The product is provided with high measurement accuracy , stable performance and simple operation and convenient to carry. It is suitable for indoor environment of family, office, inside of cars and natural environment, etc. Features: Display of representative color for pollution level. Support measure PM2.5, PM10, counting of dust particles, temperature and humidity. High measurement accuracy, stable performance ,and simple operation. It will power off automatically if there is no operation within 2 minutes at power-on state. Widely used for determination of indoor and outdoor public environment and atmospheric environment. Specification: Model: HT-9600 Color: Grey Principle of PM2.5 Sensors: Optoelectronic type Sampling method: Pumping type Light sources: Laser diode Grain size channels: 0. 3um, 2.5um, 10 um Flow: 1L/min Measurement range: 0-1000ug/m3 Resolution ratio: 1ug Test method: Manual Sampling time: 50s Sampling method: Pumping type Typical Accuracy: <20% Concentration unit: Piece/L, ug/m3 Temperature range: 0-50°C Typical Accuracy: ±1℃ Humidity range: 0-99%RH Typical Accuracy: ±2%RH Work temperature: -10~50℃ Working humidity: 10~90%RH Stored data: 1999 sets Automatic power off: 2 minutes (no key operation) Startup current: 120mA Working current: 200mA Display method: LCD value display, Color backlight Screen size: 2.8 inches Screen resolution: 320*240 Battery: 18500 Battery / 3.7V, 1400mAH (Included) Size: Approx. 245*85*40mm/9.6*3.3*1.6inch Weight: Approx. 1031g / 36.4oz Schematic diagram of concentration grade Air quality level PM2.5 average standard value in 24 hours Green Excellent 0-35 Yellow Good 35-75 Orange Slight pollution 75-115 Purple Moderate pollution 115-150 Burgundy Heavy pollution 150-250 Red Serious pollution >250 Package List: 1 x Air Quality Monitor 1 x Box 1 x User Manual 1 x Plug 1 x Data Line Note: 1. The electronic sensors and microprocessors used on the product belong to accuracy electronic device. The product must be kept away from water, fire, inflammable oil and gas or sites with strong electromagnetic interference to prevent influence on/damage to the device. 2. Don't block; or avoid strong air or hot air blowing to the air inlet for air sampling. 3. Please use dry cloth to wipe the instrument case. Don't use damp cloth or corrosive detergents. 4. Don't dismantle and remodel the product without authorization. .5. Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering. 6. Please note that the warm-up time is 120 seconds, and it is normal to display 0 when it is about 65 seconds.