Majantys has released a new version of its miniature spectrophotometer, the Probe4Light, featuring an optical resolution down to 5 nm. The device, designed for the characterization of light sources, is compact, flexible and reliable. It has a miniature, rugged grating sensor for spectral and color parameter measurements over the visible spectrum from 380 to 780 nm. Initially designed with an optical resolution of 10 nm, it is now available with 5-nm FWHM optical resolution. The wavelength accuracy remains unchanged at 0.5 nm over the full spectral measurement range. It has a USB interface and may connect to any compatible PC running Windows operating systems.