Portable co2 ppm meters carbon dioxide detector co2 TVOC HCHO AQI monitor multi gas analyzer About Products: Dust partical counter is a simple and reliable measuring instrument that combines ease of use and performance. Our monitor allows you to track 4 for key air quality factors: TVOC,HCHO,CO2, environmental,AQI.. Powered by rechargable lithium battery, the air quality monitor makes it easy to take measurements from one room to another in order to get an overview of the air quality in a home, workplace, school, a daycare centre or any other location. The Air Quality Monitor is also an essential tool to use when performing property inspections or when using any household tools to see if there is any abnormal amount of toxin release. It is also recommended to track the air quality while you cook or doing house cleaning. The tests suggest that such actions can release an excessive amount of toxins for a short period of for time. Don'for t Let Poor Air Quality Hurt Your Furry Friends Some tips for pet owners experiencing poor air quality. Remember that if you feel uncomfortable inside by air quality, your dog is affected much more than you are. Don'for t wait until you begin feeling affected by poor air conditions, because it may already be causing your pet discomfort. Many older dogs or cats have unidentified breathing problems that can be magnified during periods of poor air quality Choose your cleaning products carefully, since some can release a high level of toxins that you and your pet breathe. #1 (with lithium battery); #2 (without lithium battery) Package included: 1 * Air Quality Tester 1 * USB Charge cable 1 * User Manual