•[5-in-1 Functionality] This versatile air quality monitor supports your health by tracking multiple key parameters, ideal for use in homes, offices, classrooms, hotels, gyms, greenhouses, warehouses, and more •[LCD Color Screen] Displays CO₂ levels, CO₂ index, HCHO (formaldehyde), TVOC, temperature, humidity, and battery life. The LCD color digital screen provides clear readings, even in dark settings •[CO₂ Monitor] Equipped with a semiconductor sensor and airflow detection for quick, accurate measurement of CO₂ concentrations in your environment •[4-Color Indicator with Alarm] CO₂ levels are visually indicated: green (0-799 PPM), yellow (800-1199 PPM), orange (1200-1599 PPM), and red (1600+ PPM). An alarm sounds if CO₂ levels exceed 1500 PPM, alerting you to poor air quality •[Rechargeable Design] Built-in 1200mAh rechargeable lithium battery with long-lasting power. The device charges quickly through a USB Type-C port, compatible with adapters, power banks, and laptops Specifications: •Voltage: 5V DC •CO₂ Detection Range: 400-5000 PPM •HCHO Detection Range: 0-0.6 mg/m³ •Temperature Measurement Range: 0-50℃ •Humidity Measurement Range: 0-99% RH •Charging Port: Type-C, 500mA •Screen: LCD color display •Detection Principle: NDIR •CO₂ Detection Sensitivity: 1 PPM •TVOC Detection Range: 0-2.0 mg/m³ •Temperature Accuracy: ±1℃ •Humidity Accuracy: ±2% RH •Battery: 3.7V 1200mAh lithium battery Package included: •1 x Carbon Dioxide Detector •1 x USB Cable •1 x English User Manual