SCO-220 is kind of wireless sensor for monitoring indoor CO2 concentration and temperature / humidity degree. It's very easy to understand and operate, and very suitable to put in meeting room or inside the car or other specific indoor environment.   
 
Features Highlight: 
Highly reliable gas sensor by Non-Dispersive Infra-Red(NDIR) technology
Quick warm-up and response by special chamber and fan design
Wide CO2 concentration detection and range up to 3000ppm
Two levels alarm by user defined - backlight change and buzzer alarm
Temperature and Humidity monitoring included

Function Specification:
- ZigBee Pro (2.4GHz) RF interface 
- 0~3000ppm (±50ppm ±5% of measured value) 
- 0°C to 50°C (±1°C) temperature detection 
- 0%~95%RH (20%~80%RH:±5%; others:±8%) humidity detection 
- Backlight design