Description: 【Product List】: 1 Air Quality Tester. The size is 105mmx83mmx48mm 【four in 1 detection device】: Air Quality Meter includes Air Quality Tester function, thermometer function, humidity detection function, and an infrared detection device. You can fully understand the condition of the environment. 【Material】: Air Quality Tester is made of quality materials, with good durability and accuracy, providing you with reliable data. 【Applicable】: CO2 Detection Device is simple and easy to use, suitable for home, office, school, and other occasions. 【Multi function】: maximum and minimum value memory function, comfort level display, and sound alarm function. More in line with your needs. Specification: Voltages: 3.7V Resolution: 0.1 Measuring Range: 400-5000ppm Temperature Range: 0~50°C Humidity Range: 25~95% Battery Capacity: 2000mah Type: Type C Interface Battery Protection: Automatic Power Off When Fully Charged Size Chart: 105mmx83mmx48mm/4.13inchx3.27inchx1.89inch Package Includes: 1 Air Quality Meter 1 Charging Cable Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful on-line shopping!