Features: [5-in-1 Air Quality Monitoring]: Monitors five key environmental parameters in real time — formaldehyde (HCHO), volatile organic compounds (VOC), carbon dioxide (CO₂), temperature, and humidity — to help maintain a healthy indoor environment. [Advanced Sensors]: Equipped with built-in semiconductor air sensors and temperature/humidity sensors for responsive, accurate detection of multiple air quality indicators. [Wi-Fi Connectivity]: Connects to the Tuya Smart App via Wi-Fi to display real-time readings. Set custom alert thresholds; the device will notify you when levels exceed your preset values. [Voice Control Compatibility]: Works with voice assistants supported by the Tuya Smart App for hands-free operation. [Smart Device Integration]: Compatible with compatible air conditioners, air purifiers, humidifiers, and fresh air systems via the Tuya Smart App for automated environmental optimization. [Durable Design]: Made with high-quality PVC housing — sturdy, impact-resistant, and designed for long-term reliability. Multiple ventilation openings ensure optimal airflow for consistent sensor performance. [Flexible Placement]: Compact and lightweight design supports both tabletop and wall-mount installation. Ideal for use in homes, offices, classrooms, warehouses, and other indoor spaces. Specifications: Operating Voltage: 5 V, 1 A Operating Current: 10–496 mA Communication Protocol: Wi-Fi (ZigBee optional) Operating Temperature: –20 °C to +85 °C HCHO Range: 0–10.00 mg/m³ VOC Range: 0–99.9 ppm CO₂ Range: 350–2000 ppm Temperature Range: 0–60 °C Humidity Range: 0–95 % RH Note: English version included. Please note: Slight color variations may occur and do not affect functionality.