Features 1、Colorful Display: Color screen display makes this temperature humidity tester easier to read and identify in the dark, providing clear and accurate readings at a glance. 2、Portable and Versatile: With a compact size, the CO2 temperature humidity sensor detector is easy to carry around and suitable for use in various settings such as homes, offices, malls, hotels, etc. 3、Real Time Detection: The air quality detector is capable of real time detection of CO2 concentration, humidity, and temperature. CO2 detection range 400‑5000PPM. Temperature detection range 0‑50℃. Humidity detection range 0‑99%RH. 4、Color indicator: The color indicator of the temperature humidity tester changes according to the current CO2 concentration, providing visual alerts for easy monitoring. 5、Convenient Charging: The CO2 temperature humidity meter can be charged via any mobile device's charging port. The battery indicator flashes when charging and stops when full charging, ensuring convenient and reliable power supply. Specifications Item Type: CO2 Temperature Humidity Sensor Battery: Polymer Lithium Battery 1200mAh (Included) CO2 Detection Range: 400-5000PPM Temperature Detection Range: 0-50°C Humidity Detection Range: 0-99%RH CO2 Accuracy: ±1ppm Humidity Accuracy: ±2%RH Charging Time: 2-3h Working Time: 4-6h Weight: Approx. 195.00g / 6.88oz Package List 1 x CO2 Temperature Humidity Sensor 1 x Data Cable 1 x Instruction Manual 1 x Storage Bag