OZ Optics’ handheld optical spectrometers provide our customers with a compact, cellphone based, easily networkable (receiving and transmitting, emailing) high standard instrument to coverwavelengths from 250–1100 nm.There are three different wavelength ranges. 200–800 nm, 400–800 nm, and 400–1100 nm. They have different applications.There are apps available for all three spectrometers.