Specifications: 254nm Shortwave and 365nm Longwave UV Lamp for Fluorescence Stamps & Banknotes Note: 4 AA batteries (Not included) This long wave lamp will show the different types of fluorescent and colored bands on GB stamps (see illustration 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 such as OCP, FCP, PCP, and ACP. For best results, use in a dimly lit room against a dark background. This handheld portable model requires 4 AA batteries. Short wave Lamp: This short wave lamp will clearly show the phosphor and phosphor afterglow on GB stamps up to 1992. For best results, use the short wave lamp in a dark room—the darker the room, the better. To see the different colored phosphors on the 1960 Wildings issue, observe the phosphor afterglow when turning the UV light off. Green phosphor is the brightest (10 seconds afterglow), followed by blue (15 seconds), while violet has a very short afterglow (5 seconds). The afterglow may be difficult to see in daylight; a dark environment is recommended. This handheld portable model requires 4 AA batteries (Not included). Condition: 100% Manufacturer: China Package Included: 1 x 365nm longwave UV lamp 1 x 254nm shortwave UV lamp