This is a high-quality air quality detector with a compact, lightweight, and portable design. It features high-accuracy temperature and humidity sensors for real-time detection, automatic data refresh, and self-calibration. The large LCD display with backlight clearly shows CO2 levels, TVOC levels, HCHO levels, temperature, humidity, and battery status. Applications include agricultural monitoring, greenhouse farming, warehouses, manufacturing facilities, home environments, offices, and more. Features: - Compact size, lightweight, and easy to carry - High-accuracy temperature and humidity sensors with strong interference resistance, stable performance, and low power consumption - Large backlit LCD display; backlight can be turned on or off - Real-time detection and automatic data refresh - Press and hold the calibration button for 5 seconds to reset and clear data for accurate re-measurement - Max data viewing function press the "MAX" button to view the highest recorded values - Air quality level indicator with three distinct levels for clear understanding of current air conditions - Ventilation holes on the housing enhance air exchange, ensure accurate detection, and improve heat dissipation Specifications: - Name: Air Quality Detector - Material: ABS - Sensors: Digital temperature and humidity sensors - Display: LCD with backlight - Battery: 1 x built-in lithium battery, 3.7V, 1000mAh (included) - CO2 measurement range: 385 ppm to 2000 ppm - TVOC measurement range: 0.000 mg/m to 2.000 mg/m - HCHO measurement range: 0.000 mg/m to 1.000 mg/m - Temperature measurement range: 0C to 90.0C (32F to 194F) - Humidity measurement range: 0% to 90% RH - Item size: 177 x 79 x 40 mm (6.97 x 3.11 x 1.57 in) - Item weight: 191g (6.74 oz) - Package size: 201 x 112 x 38 mm (7.91 x 4.41 x 1.50 in) - Package weight: 220g (7.76 oz) Packing List: - 1 x Air Quality Detector - 1 x Cable - 1 x User Manual