Powerful Sensor: 9 in 1 air quality monitor is equipped with powerful sensors that detect the main 8 kinds of air data in real time, all displayed on one sleek, clear LCD screen. App Real Time Monitoring: The CO2 detector can be used with a mobile phone to connect to for Tuya App via wifi for settings and history viewing. Easy to Use: Air quality monitor doesn't need complicated applications, bad written instructions. Our device was specially designed to be operated by anyone, anywhere. So you can keep your space safe without a tech induced headache. Easy to Carry: The portable air quality monitor is equipped with a durable 2000 mAh rechargeable lithium ion battery, designed for carrying around, and can monitor air quality for hours on a single charge. Widely Used: The air quality tester is perfect if you are near a wildfire or if you depend on old or wood powered appliances in your home. The 9 in 1 monitor is also a carbon dioxide monitor and guards your air quality by letting you know when particulate matter and VOCs are unusually high., Manufacturer: HIJYMNZPQ