These three pocket UV kits offer a variety of invisible marking applications. All three kits include our UV LED Mini Light Source. The UV750 employs a UV felt-tip pen; the UV760 includes the felt-tip pen as well as two UV powders (UV201V, UV202V) and an applicator brush (120L). The UV770 features four UV powders (UV201V, UV202V, UV203V, UV204V) and two No. 119L brushes. Use the pen to mark virtually any surface. Apply powders for thief detection.