E Instruments’ BTU1500 all-in-one Portable Combustion Analyzer High Efficiency Kit includes: incoming air smart probe; field-replaceable sensors; built-in printer (nonthermal); large full-color display; “boiler room” design; Bluetooth wireless communication; rechargeable battery and AC charger; built-in manometer; built-in thermometer (ambient and flue gas); built-in CO leak detector (safety); calibration certificate for proof of accuracy; dual hose (9’) and 12” probe (gas and draft at same time); and a vinyl carrying case.