?365NM INVISIBLE LIGHT?--365nm light is invisible to the naked eye, so that it is not as BRIGHT as the 395nm flashlight, but better for detection of high demand like fluorescent agents security code. Warm tips: Please clear your needs before ordering. ?LIGHT ON A DIFFERENT LEVEL ENTIRELY?-- 365nm light is the real dedicated detection spectrum. It can be used in natural light and performs better in the dark with little visible light leak. ?MULTIFUNCTIONS BATTERY POWERED?-- Best choice for fluorescent agents security code detection, Right-hand man of housework (dog, cat, rodent stains), Powered with 1 AA battery (INCLUDED). ?TINY SUIT FOR ALL SURFACES?-- Lightweight and handy. Easily put into pocket, backpack, toolbox and your car-SAVE SPACE. It works well on all kinds of surfaces in your living room, kitchen, bathroom, bedroom, garage and your car. Point out hidden nasty spots around you anytime and anywhere. ?FOCUS ADJUSTABLE WITH HIGH QUALITY DESIGN?-- Zoom in/ out to adjust suitable light range. Enlarge the beam to circle the suspected area and narrow down to mark the pet's urine. The body is made of high quality aluminum alloy long lasting.