The ST4UV is the ideal, compact pen lamp with that certain extra: additional UV light. In addition to the proven Ledlenser technologies, an UV-LED is built in, which enables extended functions, e.g. banknote or document control. The UV light can either be switched on permanently or blink at a slow frequency so that fluorescent areas stand out better against the rest of the background. The aircraft aluminum housing, the metal clip and the easy operation with the end cap switch complete the convincing overall package of the ST4UV.