The Thermo Scientific Genesys 20 SpectroPhotoMeter 4001/4 is a used daily device manufactured in the United States by Thermo Spectronic. Came from a lab that he retired so it works perfect and calibrated jan 2024. Model 4001/4, cat 4004, 115 v.  It is a reliable tool for various business and industrial applications, offering accurate test, measurement, and inspection capabilities.