INVISIBLE 365NM ULTRAVIOLET LIGHT The 365nm ultraviolet light is invisible to the naked eye, so that looks not as BRIGHT as the 395nm light, but more perfect for demanding detection like fluorescent agents & -counterfeiting code (will detect more efficiently in darker environments). NOTE: Please clear your needs before ordering. FOCUS ADJUSTABLE & MINI POCKET-SIZE Zoom in/ out to adjust suitable light range. Enlarge the beam to circle the suspected area and narrow down to track suspicious odor, NO need to walk around or bend frequently. NO SPACE WASTE - Lightweight and handy design for easy operation in the palm. Easily clipped to your belt, pocket, backpack, and toolbox. Well made of durable and long lasting aluminum alloy. Well made of durable and long lasting aluminum alloy. HIGH POWER & HIDDEN USB CHARGE The mini but powerful blacklight can work continuously for 1 hour. Power Indicator Automatically turns to RED light to remind you to charge in time, avoi