testo 440 air velocity and IAQ measuring instrument, 3 AA batteries, USB cable, and certificate of conformity, CO2 probe with Bluetooth and humidity/temperature sensor* consisting of CO2 probe head and Bluetooth handle, 4 AA batteries, table stand, and calibration protocol 0632 1551, Turbulence probe with fixed cable length 4.6′ and a Multi-case for a testo 440 and multiple probes 0516 4401
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