Description Description: This indoor air analyzer provides an easy way for you to test and track the TVOC in a room. This digital air quality meter features TVOC and temperature measurement. This air quality detector can record the data, so you can easily view and track the data on a mobile phone app. This TVOC tester provides a long-term record, it can record for 24 hours non-stop. This air quality tester can be powered by mobile power, which makes it can properly work even be placed in a sealing space. Specifications: Power supply: USB 5V. Connection mode: BT 4.0. TVOC detection range: temperature 5-35, 0~9.999mg/m3. Temperature detection range: -10~50C. size: 75x75x50mm. Note: There might be a bit color distortions due to different computer resolutions. There might be a slight errors due to different hand measurement. Package included: 1x Air quality tester. 1x User manual.(English)