It is a useful instrument to measure indoor CO2 concentration, temperature and humidity. With a plastic case, the detector is well protected.

Features:
It is a useful instrument to measure indoor CO2 concentration, temperature and humidity.
2 temperature units can be displayed: Celsius(°C) or Fahrenheit(°F).
With large LCD display and bright backlight, convenient to read.
It can display time and date, also can give a CO2 concentration warning, really practical.
With a USB cable, it can be connected with computer.
Stable NDIR sensor for CO2 concentration.
Can be powered by batteries(not included) or power adapter.

Specifications:
Display: 3.5" LCD Display
Carbon Dioxide(CO2):
Range: 0-9999(out of scale)
Accuracy: ±50ppm ±5%rdg
Response Time: 10s
Temperature:
Range: -10.0~70.0°C / 14~158°F
Resolution: 0.1°C/°F
Humidity:
Range: 0.1~99.9%
Resolution: 0.1%
Logging Memory: 12700
Operating Temperature: 0~50°C
Operating Humidity: 0~95%RH
Power Supply: 4 * 1.5V AA Batteries(not included) / Power Adapter
Power Adapter: AC100-240V 50/60Hz(input) 6V/2A(output)
Plug Type: US
Item Size: 14 * 10 * 3.5cm / 5.5 * 3.9 * 1.4in
Item Weight: 259g / 9.2oz
Package Size: 27 * 21 * 6.5cm / 10.6 * 8.3 * 2.6in
Package Weight: 897g / 31.7oz

Package List:
1 * Carbon Dioxide Detector
1 * USB Cable
1 * Power Adapter
1 * CD
1 * User Manual
1 * Case