Product features: lightweight, portable, uniform light, uniform spot, wide light projection, no color difference, no light lines, easy charging, can be used at any time. Narrow-band filter, combined with uniform flashlight output, can directly stimulate biological samples, meet the needs of field investigation, and can be placed on a tripod for photography. Stable performance, continuous useIt can still be used normally after more than 8 hours, and the core components will not be damaged. It is used to collect evidence of fingerprints, footprints, blood marks, fibers, blood, semen spots, human tissue fluid, drugs, pesticides, explosive residues and so on.