Feature: 1. Real-time temperature, humidity, CO2 concentration, HCHO, TVOC can be measured at the same time. 2. 1s automatically refresh the detection data, monitor in real time. 3. 2.9-inch color LCD display, large enough to view the data. 4. Intelligent alarm sounds up once the data exceed the value. 5. USB rechargeable air quality detector built-in with 1200mAh lithium battery. Specification: Features: Real-time temperature, humidity, CO2 concentration, HCHO, TVOC can be measured at the same time. 1s automatically refresh the detection data, monitor in real time. 2.9-inch color LCD display, large enough to view the data. USB rechargeable air quality detector built-in with 1200mAh lithium battery. Can be used in home, greenhouse, breeding, school and other public places to monitor carbon dioxide and temperature/humidity. Specifications: Color: Black / White (Optional) Material: ABS CO2 Detection Range: 400-5000ppm CO2 Detection Sensitivity: 1ppm TVOC Detection Range: 0~2ppm Temperature Measurement Range: 0~50℃ Temperature Measurement Accuracy: ±1℃ Humidity Measurement Range: 0~99%RH Humidity Measurement Accuracy: ±2%RH Working Voltage: 3.7V Charging: DC5V/1A Error: ± 50ppm Sensitivity: 0.45 ± 0.15MA/ppm Anti Interference: 47.22% Response Time: ≤60s Item Size: 105 * 95 * 45mm / 4.13 * 3.74 * 1.77in Item Weight: 112g / 3.98oz Package Weight: 215g / 7.60oz Package Size: 17 * 14 * 5cm / 6.69 * 5.51 * 1.97in Packing List: 1 * Air Quality Detector 1 * Type-C Cable 1 * Manual (English) Package List: 1 * Air Quality Detector 1 * Type-C Cable 1 * Manual (English)