rate: 75The product has a good texture and many items to be tested, it is recommended.
The seller's packaging is excellent, shipping is fast, it is recommended. The product has a good texture and many items to be tested: temperature, humidity, PM2.5, CO2 & total volatile organic compounds. However, the battery is not very powerful, if there is no power for about 8 hours. When continuous measurement is required, it is recommended to connect an external power supply.Jun 22, 2019