Comfort Chek 500, CO2 RH, Temp

Indoor Air Quality Monitor, Carbon Dioxide Concentration 0-5000 ppm, Temp. Range 32 F to 122 F, Relative Humidity Range 0-95 Non-Condensing / 1 Resolution, Dew Point Range 0-95, Wet Bulb Temperature Range 14 F to 140 F, Humidity Accuracy 2, Data Hold Y, Includes 4 Alkaline Batteries, 9 VDC to 10 Volt Wall Adapter, Softare And Cable, Carry Case, Manufacturers Warranty Length 2 Years