In 1960, Theodore Harold Maiman
 The first laser was invented based on the theory of Townes and Sharow.
 It is a red laser pointer with a class 2 rating and an output of 0.5mW.
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 It has a standby time of more than 5 years by adopting alkaline battery type.
 It can be used continuously for more than 2 hours.
 -caution-
 Do not use in human eyes
 Complete waterproofing is not supported. It provides IP61 waterproof function.