Air Quality, Stable Portable 3 in 1 Air Quality Tester Mutifuctional for Detecting Air Quality for Grasp the Trend Of CO₂ Changes

Device sharing, you can share with up to 4 people. A 90‑day historical record of cloud storage technology.
Carbon dioxide solid electrolyte chemical sensor is reliable and accurate, with stable performance.
2 different networking methods, namely WiFi networking and mobile phone hotspots to simulate WiFi networks to allow devices to go online.
Work online 24 hours a day and all year round, check every 5 seconds to accurately grasp the trend of CO₂ changes.
Use the mobile phone APP settings to automatically turn on or turn off the display content.