Feature: 1. Accurately measures and monitors the indoor HCHO, VOC(volatile organic compounds), CO2(carbon dioxide), temperature, and humidity levels. 2. Helps you to check the current air quality in you home remotely, simply view it on phone via the app . 3. Sends real-time alert prompt when the air quality exceeds the normal range. 4. Able to interconnects with other intelligent home appliances like air conditioner, air purifier, humidifier, etc. to build a smart home. 5. History data graph clearly shows you the changes of air quality in day, month and year. 6. USB-powered air quality detector can be powered by any usb devices, easy to be carried around. Specification: Specifications: Network Version: for Zigbee Material: PVC Color: White Input: 5V, 1A VOC Measuring Range: 0~99.9 ppm CO2 Measuring Range: 0~1000 ppm Temperature Measuring Range: 0~60℃ Humidity Measuring Range: 0~95% Item Size: 9*9*3.5cm / 3.54*3.54*1.37in Item Weight: 60g / 2.11oz Package Size: 9.5*9.5*4cm / 3.74*3.74*1.57in Package Weight: 92g / 3.24oz . Package List: 1 * Air Quality Monitor 1 * USB Cable 1 * Eject Pin 1 * User Manual(English)