This 2 AA Mini-TAC UV Gooseneck light uses an Ultraviolet LED rated at 365 Nanometers for the purpose of detecting hidden security markings in documents, spotting leak detection fluids and as an aid in visually locating proteins in forensics work. With a water resistant design, it is constructed from aircraft-grade 6061-T6 aluminum with a Type II hard anodized finish. The tail switch provides momentary or constant-on functionality. The gooseneck design and the included magnetic base make it a perfect light for hands-free close up illumination. The light also includes a removable wrist lanyard. The MTU-136 is powered by two included AA batteries.