Air Quality Meters features: Portable air quality detector digital temperature humidity sensor tester co2 carbon dioxide tvoc formaldehyde hcho detector new(White) Color: we send based on the color or size of the main image of the product page. Quantity：we send based on quantity on title, if there is no quantity in the title, we send based on description. Colour:White Portable Air Quality Detector Digital Temperature Humidity Sensor Tester CO2 Carbon Dioxide TVOC Formaldehyde HCHO Detector New Features: 1.With TVOC sensor, it can detect TVOC in the environment and better understand the environment. 2.Real-time monitoring and real-time display of carbon dioxide concentration per cubic meter. 3.This detector is small and portable, can clearly display HCHO and CO2 concentration, the temperature and humidity of the environment, suitable for office, home, gym and other use scenarios. 4.It can detect and display the temperature and humidity of the environment to help users understand the environment. 5.It is suitable for office, family, gym and other occasions, with a wide ranges of applications. 6.Intelligent color screen display, the number is clear, easy to identify and read. 7.With alarm mode, through color change, users are prompted to pay attention to the environment. 8.It has long service life and can be charged with USB cable. 9.Small and portable, easy to carry, does not take up too much space, can be installed in the home. Specifications: Display method: 2.8”LCD screen display, 240*320 pixels Temperature and Humidity sensor Detection range: CO2 ( 0-6000 ppm) Sampling time:1.5 seconds Product Size:89*70*35MM，150G Detection temperature: -10°C to 70°C; Relativehumidity:10% - 99% Storage temperature:-10°C to 60°C; Concentration unit for HCHO and TVOC: mg/m³ Powersource:Lithium battery with 1500 mAh capacity; 5V DC power charging via micro USB port Product weight: 250g The package: 1 * Detector 1 * USB Cable 1 * Manual Note: 1. Due to different light and screen, the color of the item may be slightly different from the picture. 2. Due to manual measurement, please allow 1-2 cm difference.