Output Power 20mw 
Wavelength 405nm 
Working Voltage 3.7V 3.8v 
Working Current 280mA 
Working Temperature+20 degree~+35 degree ( 0 degree~10 degree, need 30 seconds warm up ) 
Duty Cycle 45 seconds ON, 15 seconds OFF 
Laser Shape DOT 
Divergence <25×25mm at 15m 
Material and Color Brass 
Lens Glass 
Dimensions 12 × 34 mm

Details

The 20mW blue-violet ray laser module is an electronic component for Lab, Industrial, DIY use. Please notice that it is NOT a hand-held laser pointer. This module is a component we used to produce a 405nm laser.
The laser module is precise instrument. Before carrying on some laser DIY activities, please read about the technical information first and protect your eyes before 30mW laser ray. You must know the possible hazard when doing laser DIY.

Please notice that 405nm laser beam is not as strong as 532nm green beam. 

Please avoid direct eye contact to the laser

Package: 

1   x  20mw 405nm Violet/Blue Laser DOT Module