UV keychain LED light UV led lamp 402 nm
Product 24688. UV keychain LED light UV led lamp 402 nm +/- 5nm. For money identification, tape loading. The light comes on by squeezing the covers lightly or with a switch, leaving the light on all the time. 2 x CR2016 battery (included). The wavelength of this is pretty much visible to the human eye than the 373nm wavelength, even though this one looks "dim" and "faint" even though the battery still has charge left. DO NOT LOOK directly at the LED can damage the eyes !!!