Feature: 1. 【Comprehensive Air Quality Detection】This 11-in-1 air quality tester integrates multiple test functions for measuring AQI, CO, CO₂ levels, TVOC, humidity, temperature, PM2.5, PM1.0, PM10 particles, HCHO, and time. It provides a comprehensive way to constantly track indoor air quality, empowering you to stay informed about the air conditions in your home from anywhere, at any time. If any parameter exceeds the set standards, it promptly sends real-time intelligent alerts through the mobilephone app. 2. 【Built-in High-precise Sensor】Utilizing high technologies such as NDIR infrared carbon dioxide sensors, laser particle sensors, semiconductor sensors, and optical sensors to guarantee accurate detection results and meet various measurement requirements in different application scenarios. 3. 【Automatic Calibration & Brightness Adjustment】The automatic calibration feature guarantees the accuracy of the test outcomes. This device is designed to automatically regulate its screen brightness based on the surrounding light conditions, and it further supports an energy-saving screen-off mode. Even when the screen is turned off, it continues to test the concentrations of various gases, thus achieving high practicality and energy efficiency while being eco-friendly. 4. 【Convenient APP Control & Intelligent Reminder】Supporting APP control, the device comes with a built-in Wi-Fi function, enabling remotely control and real-time data querying capabilities accessible via a mobilephone application. 5. 【Humanized Design & Multi-scenario Application】The product design is compact and supports wall-mounted installation, equipped with positioning stickers and wall accessories, space-saving and aesthetically pleasing design. Applicable to families, schools, hospitals, children's rooms, hotels, restaurants, cars, and other places. Specification: Specifications: Model: PV33B-CO / PV33-CO (Optional) Material: ABS Sensors: NDIR infrared carbon dioxide sensors, laser particulate sensors, semiconductor sensors, optical sensors , carbon monoxide electrochemical sensor Detection Technology: infrared detection technology, laser detection technology, semiconductor detection technology, electrochemical detection technology Display: TFT-LCD display CO Detection Range: 0~1000 PPM CO Detection Accuracy: ±10 PPM or 5% CO₂ Detection Range: 400~5000 PPM CO₂ Detection Accuracy: ±(50 PPM+5% * reading value) PM1.0/2.5/10 Detection Range: 0 ~1000 μg/m³ PM1.0/2.5/10 Detection Accuracy: ±10 μg/m³(0~100 μg/m³) ±10%(100~500 μg/m³) HCHO Detection Range: 0~1.999 mg/m³ TVOC Detection Range: 0~9.999 mg/m³ Temp Detection Range: 0~50℃ Temp Detection Accuracy: ±1℃ Humidity Detection Range: 0~99%RH Humidity Detection Accuracy: ±5%RH Input Voltage: 5V Battery: Built-in 3000mAh battery Charging Interface: Type-C Item Size: 120 * 89 * 35mm / 4.72 * 3.50 * 1.37in Item Weight: 209g / 7.37oz Package Weight: 322g / 11.35oz Package Size: 13.5 * 10.4 * 7.2cm / 5.31 * 4.09 * 2.83in Package List: Package List: 1 * Air Quality Monitor 1 * Type-C Cable 1 * Positioning Reference Sticker 1 * Self-tapping Screw Set 1 * User Manual (English)