Usage Tips:1. Portability: The Carbon Dioxide DetectorD is compact, small and , making it easy to carry. 2. Fast Detection: The CO2 Meter is equipped with temperature and humidity sensors for fast and accurate air quality detection. The intuitive data display provides accurate and reliable air quality readings, allowing users to take informed action to improve the health and safety of their indoor environment. 3. Multiple Functions: The air quality monitor detects a range of common air pollutants such as CO2, CO, HCHO, TVOC, PM1.0, PM2.5, PM10 and can also measure air temperature and humidity. 4. Easy to Use: The CO2 Meter starts working automatically and detects air without calibration after being switched on. With an intuitive interface and simple button controls, this air quality monitor is easy to use and read 5. Multi-application: The air quality tester should be excellent for monitoring airborne pollutants and is widely used use, educational institutions, agricultural farming, greenhouse farming, warehouse operations, material processing, etc. Specification: Gas Type: Multifunctional With LCD Screen Or Not: Yes Model Number: Carbon Dioxide Detector Built-in lithium battery: 2000mAh Charging: 3-4 hours Continuous use: 6-8 hours Working voltage: 3.7V Current: 150mA Power: 0.6W Material: plastic colour: white Package Contents: 1 x Air Quality Monitor Meter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.