This handy UV lamp unites two functions in one device. Stamps, bank notes, credit cards, telephone cards etc. can be examined for both fluorescence and phosphorescence. The combination of short and long UV rays (254/380mm) makes the lamp especially practical for the user. The UV hand lamp has a built-in filter against long-wave residual light. Battery operated: 4x AA. 4 watt (254 nm) or 3-4 mW (380 nm). Overall size: 55 x 163 x 23 mm (2 1/8 x 6 1/2 x 1").