Feature: 1. 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. 2. 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. 3. 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. 4. 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. 5. 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. Specification: Item Type: Air Quality Monitor Material: ABS Application: Support for Tuya app Connection Method: Wifi Screen Display: HD LCD color screen Carbon Dioxide Technology: NDIR PM2.5 Sensor Technology: Light scattering Temperature Unit: Celsius and Fahrenheit units switch, 24 hours real time monitoring of temperature Detection Range: PM2.5 (0 to 999ug/M³) CO2(400 to 5000 ppm) CO2 Alarm Value: 1000PPM CO2 Alarm: On or off function Battery: 1 x 18650 2000mah rechargeable lithium battery (shipped with built in battery) Atmospheric Pressure: 86Kpa to 106Kpa Sampling Time: 1.5 seconds Detection Temperature: -10°C to 50°C Detection Humidity: 20% to 85% Storage Temperature: -10°C to 60°C. Package List: 1 x Air Quality Monitor1 x Usb Cable1 x Instruction Manual