This portable air quality monitor adopts a NDIR infrared carbon dioxide sensor and a high-precise optical sensor, with stable performance and high detection accuracy, supporting real-time monitoring of CO2 concentration, temperature, and relative humidity in the air. Digital LED display, with ultra-wide viewing angle, so you can see the readings at a glance. 3D porous housing with multiple ventilation holes designed for real-time air circulation convection. The sensor and theair are fully contacted, highly sensitive, and accurate in the detection of small particle content. It can be widely used in a variety of occasions. Features: Compact and Exquisite: Compact body design, simple and stylish appearance, lightweight, and easy to carry. 3D porous housing with multiple ventilation holes designed for real-time air circulation convection. The sensor and theair are fully contacted, highly sensitive, and accurate in the detection of small particle content. CO2 Concentration & Temperature & Humidity Measurement: Built-in nice-performance infrared carbon dioxide sensor and a high-precise optical sensor to real-time detect the CO2 concentration, temperature and humidity data at the same time, to ensure obtained accurate data easily in harsh environments. High sensitivity, ultra-low power consumption, fast computing speed, and the detection results are more accurate. Digital LED Display: Digital LED display, with ultra-wide viewing angle, so you can see the readings at a glance. With automatic brightness adjustment function, according to the surrounding brightness, automatically adjust the screen display brightness, so that the screen is visible and not harsh. Energy Saving Screen Off & Hand Waving Wake-up: When no one is using the screen, it can automatically turn off the screen to reduce power consumption, and the sensor can still transmit data to the cloud via WIFI in the screen off state so that you can view the real-time values through the APP. Supports waking up the screen by waving your hand at the sensing distance. Sound & Light Alarm: Real-time monitoring of CO2 content in the environment, when the CO2 concentration reaches 1500PPM, it will promote the sound alarm. The color changes according to the carbon dioxide concentration, 400-799PPM concentration green block flash, 800-1199PPM yellow block flash, 1200-1599PPM orange block flash, 1600-1999PPM red block flash, ≥2000PPM four blocks flash. WiFi Connection & Mobilephone APP Control: Built-in WIFI for cloud link, real-time update air quality data through mobilephone APP, users can check the air quality data anytime, anywhere, allowing users to keep track of the air condition in their home and remind their family to purify the air. Wide Applications: Adopting 1000mAh high capacity polymerized lithium battery, Type-C charging port, with long-lasting endurance, suitable for a variety of complex environments. It can be widely used in a variety of occasions, such as homes, greenhouses, camping barbecues, factories, automobiles, environmental monitoring, and so on. Specifications: Name: CO2 Concentration Detector Material: ABS Battery: 1 * built-in 1200mAh lithium battery (included) Sensor: NDIR infrared carbon dioxide sensor + optical sensor Detection technology: infrared detection technology Display mode: LED display Applicable temperature: 0-50 Carbon dioxide measurement ranges: 400-5000PPM Carbon dioxide measurement accuracy: ±50PPM or 5% of reading Temperature measurement ranges: 0-50 Temperature measurement accuracy: ±1 Humidity measurement ranges: 0-99%RH Humidity measurement accuracy: ±5%RH Charging interface: Type-C interface Item size: 70 * 84 * 35mm / 2.76 * 3.31 * 1.38in Item weight: 99g / 3.49ounce Package size: 138 * 107 * 42mm / 5.43 * 4.21 * 1.65in Package weight: 186g / 6.56ounce Packing List: 1 * CO2 Concentration Detector 1 * Type-C Cable 1 * User Manual