Product Detail:Note : 4 AA batteries (Not included)Note : 4 AA batteries (Not included)Note : 4 AA batteries (Not included)254nm Shortwave and 365nm Longwave UV Lamp suitable for Fluorescence Stamps & BanknotesNotice: These 2 lamps do not have optical filter, it can not use suitable for minerals illumination !Long wave lampThis long wave lamp will show you the different types of fluorescent and coloured bands on GB stamps (see illustration suitable for blue and yellow).It will also work on stamps from Australia, Canada, China, France, Germany, Hong Kong, Mexico, Norway and Russia.This lamp will also detect different paper types ie: OCP, FCP, PCP and ACP.suitable for best results use in a dimly lit room against a dark background. This hand held portable model requires 4 AA batteriesShort wave LampThis Short wave lamp will clearly show you the phosphor and the phosphor afterglow on GB stamps up to 1992.suitable for best results use a short wave lamp in a dark room, the darker the room the better.To see the different coloured phosphors on the 1960 Wildings issue its the phosphor afterglow you are looking suitable for when you turn the UV light off,Green phosphor is the brightest (10 seconds afterglow) followed by blue, (15 seconds) the Violet has a very short afterglow (5 seconds) It will be difficult to see theafter glow in daylight, the darker the room the better.This two hand held portable model requires 4 AA batteries (Not included)NoteDue to the light and screen difference, the item's color may be slightly different from the pictures. We guarantee the style is the same as shown in the picturesPackage Included:1 x 365nm longwave UV lamp1 x 254nm shortwave UV lamp