1. Easy to use The 4.3-inch color touch screen technology and keyboard parallel dual input methods make the operation easier. Navigational menu design makes testing easier and easier to use. Built-in photometric measurement, quantitative measurement, qualitative measurement, time measurement, DNA protein measurement, multi-wavelength measurement, GLP special program; U disk data export, USB connected to computer 2. A variety of accessories are available 5-10cm optical path cuvette holder, automatic sample holder, peristaltic pump auto sampler, water area constant temperature sample holder, Peltier constant temperature sample holder and other accessories.