Feature: 1. Portable and Easy to Use: The palm sized portable CO2 detector is easy to carry and can detect gas quality in bedrooms, living rooms, kitchens, offices, cars, schools, hotels, camping and other environments. 2. Accurate Air Quality Tracking: The CO2 detector features advanced built in scatter detection sensors designed to accurately track air quality, including CO2, temperature, and humidity. 3. Electrochemical Detection Module: The electrochemical detection module with special quality is adopted, which has good accuracy, stable performance, strong anti interference ability, low consumption and long life of the box body. 4. Different Colors Flash: Large screen to show different air quality with different font colors. 0‑999ppm: green flash, 1000‑1999ppm: yellow flash, 2000‑2900ppm: orange flash, 3000‑3999ppm: red flash, 4000ppm: above four colors flash. 5. Efficient Heat Dissipation: Hundreds of vents in the rear not only speed up the convection between the air and the machine, enabling efficient detection, but also provide excellent heat dissipation. Specification: Item Type: CO2 Detector Material: ABS Weight: Approx. 240g/8.47oz Size: 14x9.3x6.8cm/5.51x3.66x2.68in Reacting Time: <1s CO2 Test Measurement Range: 400ppm-5000ppm TYOC Test Range: 1ppm Test Temperature Range: 0-50°C Humidity Measurement Accuracy: ±2% Operating Voltage: 5V 1A adapter charging Maximum Power: Charging current 600mA Battery: Dry cell 3xAA batteries(shipped without batteries) Charging Method: TYPE C Use: Carbon dioxide detector. Package List: 1 x CO2 Detector 1 x Manual 1 x USB Cable