The 5-in-1 multi-function air quality monitor can detect CO2, HCHO (formaldehyde), TVOC, temperature and humidity in your living environment. Adopting sensitive sensor, it provides fast and accurate data on the LCD digital color screen. Built with 1200mAh rechargeable battery, it can be widely used in home, office, classroom, hotel, gym, greenhouse, warehouse and more Features: 5 in 1 function: The multifunctional air quality monitor takes care of your health and can be widely used in home, office, indoor classroom, hotel, gymnasium, greenhouse, warehouse, etc. Color LCD screen: displays CO2, CO2 index, HCHO (formaldehyde), TVOC, temperature, humidity and battery level. LCD digital color display for easy and clear reading even in dark environments. Carbon Dioxide Tester: Adopts semiconductor sensor, air convection detection, quickly and accurately detect CO2 concentration in the living environment. 4-color indicator and buzzer: 0-799PPM (green), 800-1199PPM (yellow), 1200-1599PPM (orange), 1600PPM and more (red). The buzzer sounds when the CO2 concentration is over 1500ppm. Rechargeable Design: Built-in 1200mAh rechargeable lithium battery for strong endurance. With USB Type-C interface for fast charging via AC adapter, power bank, laptop, etc. Concise Appearance: Simple but elegant appearance, desktop or wall installation, fits in well with different styles of homes. Compact and lightweight, easy to carry. Note: 1. Please read the user manual carefully before use. 2. The size and color may be slightly different due to manual measurement and different light conditions. Thank you for your understanding. Features: Color: Black/White (Optional) Material: ABS + Electronic Components Screen: LCD digital color display Voltage: 5V DC Detection principle: Semiconductor sensor CO2 detection range: 400-5000PPM CO2 detection sensitivity: 1PPM HCHO detection range: 0-0.6 mg/m3 TVOC detection range: 0-2.0 mg/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 Weight Item Weight: 107g / 3.76oz Package Size: 14 * 9.8 * 4.8cm / 5.51 * 3.86 * 1.89in Weight 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)