UEI C-155 Eagle 2X Combustion analyzer. Includes analyzer, printer, charger, cabling, sampling tube & hose, instructions and case. In excellent condition. Does not have an annual certification but it still works well. Measures differential flue temperature, Carbon Dioxide, flue and ambient carbon monoxide and Differential Pressure. Calculates oxygen, gross/net efficiency, excess air, and CO air free. Has 4 line backlit LCD display, 179 memory positions, User customizable parameters view, Individual report printouts, Unique DMM style rotary selector, Protective boot w/integral magnet, Real time clock, CO readings to 1 ppm, Infrared printer port