HRS-300 is a miniaturized spectrometer that can directly collect optical signals, with a sampling range covering spectral signals of 350-1050nm. The device software uses the Android system architecture, which is easy to operate and provides quick feedback. It is capable of measuring spectral characteristics such as raw spectra, transmittance, and reflectance of spectral signals. At the same time, the miniaturized and integrated design endows the instrument with convenience and operability, with a size control similar to that of a mobile phone. Whether it is in the laboratory, industrial field, or carried to the field for use, the HRS-300 can easily handle it. The large capacity battery design ensures a long battery life of 4-6 hours for the instrument.