5-in-1 multifunction air quality monitor can detect CO2, HCHO (formaldehyde), TVOC, temperature and humidity in your living environment. Adopting sensitive sensor, it provides quick and accurate data in the LCD digital color screen. Built in with 1200mAh reable battery, it can be widely in home, office, classroom, hotel, gym, greenhouse, warehouse and more Note: 1. Please read the user manual carefully before use. 2. Size and color may be slightly different due to manual measurement and different light conditions. Thanks for understanding. Specifications: Color: Black/ White (Optional) Material: ABS & 43; Electronic Components Screen: LCD Digital Color Screen Voltage: 5V DC Detection Principle: Semiconductor Sensor CO2 Detection Range: 400-5000PPM CO2 Detection Sensitivity: 1PPM HCHO Detection Range: 0-0.6mg/m3 TVOC Detection Range: 0-2.0mg/m3 Temperature Measurement Range: 0-50? Temperature Measurement Accuracy: ±1? Humidity Measurement Range: 0~99% RH Humidity Measurement Accuracy: ±2% RH Charging Port: Type-C, 500mA Built-in Battery: 3.7V 1200mAh Lithium Battery Item Size: 90 70 35mm / 3.54 2.76 1.38in Item Weight: 107g / 3.76oz Package Size: 14 9.8 4.8cm / 5.51 3.86 1.89in Package Weight: 168g / 5.93oz Package List: 1 Air Quality Tester 1 USB Cable (Type-C) 1 User Manual (English, Japanese, Italian, German, Spanish, French)