1、3 IN 1 DETECTOR: This 3 in 1 carbon dioxide monitor can detect real time carbon dioxide concentration, monitor indoor and outdoor humidity and temperature. 2、LCD SCREEN: This detector is designed with full color display and LCD screen, digital display with intelligent backlight, easy to read. 3、APP CONTROL: This detector has a corresponding APP. After you download it, you can monitor the air quality on your mobile phone, and realize remote control with one key operation. 4、MINI SIZE: The portable detector is only palm sized and easy to carry, so you can check the air quality anytime, anywhere. 5、MULTIPLE USES: The detector can detect the air quality in bedrooms, living rooms, kitchens, offices, cars, schools, hotels, campsites and other environments. Item Type: Indoor Air Quality Meter Material: ABS CO2 Sensor: 400-5000PPm Accuracy: ±(50ppm+ 5% of reading value) Humidity Detection Range: 0-100%RH Humidity Detection Accuracy: ±2%RH(25℃) Temperature Detection Range: -10 to +50℃ Temperature Detection Accuracy: ±0.3℃ Communication Protocol: WiFi 1 x Indoor Air Quality Meter 1 x Instruction1 x Data Cable