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New in box. These are etched in the plastic with some initials, but they have clearly never been used in a work site. I had one of these recently bumped, and it had a bad O2 sensor. The other 4 sensors and pump were good. Includes ALL sensors, Wand with Filter, Sampling hose and Instruction Manual disk. This model has the color screens, but no Bluetooth capability.
I don't know the history of these and I cannot guarantee the functionality of any of the sensors, so keep in mind that some may need replaced.
If these don't sell after some time, I plan to part them out and sell all of the items separately. Please ask questions BEFORE offerding. Non-smoking home.