... Support temperature control,key switch,led indicator Visible laser diode Product name: 300mW,350mW,400mW,500mW, ... Long lifetime chip,expected lifetime:more than 5000hours.Clearly visible in the dark and lighted area.High quality, ... key switch,led indicatorExpected lifetime(hours)>5000 hoursLaser type:Visible laser diodeOperating temperature0-40Storage temperature-10~50Dimension40 diameter ×225mm ...