Temtop Aerosol Dust Monitor PMD 351 Professional Air Quality Particle Counter

Description

Temtop Aerosol Dust Monitor PMD 351 Professional Air Quality Particle Counter.
This unit was received as part of a larger purchase and appears completely new and unused except for the labeling and what appears to be marking from a utility knife on the outer case.
It powers up fine and goes into a reading mode. It also powers down fine.
I'm not knowledgeable enough about particulate measurement to test it further.
I've included pictures of all included cords. None of them look they have ever been unwound.
I've also included a Kingston 32GB USB memory card. It is not included in the pictures, but is included in the purchase.
Money back guarantee for 48 hours from delivery that it is not DOA. I cannot warranty this product beyond that.