US-110 is kind of standalone detector 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 - 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