20mw Blue Violet star laser pointer pen 5 in 1 Blue Violet laser pointer

Instruction:
A cheap blue violet laser 20mw is a small laser designed to highlight something of interest by projecting a small bright spot of colored light onto it. The laser beam is not in itself visible from the side, but is visible as a result of light scattered by dust particles along the beam path. The small width of the beam and low power of typical laser pointers make the beam itself invisible in a reasonably clean atmosphere, showing a point of light when striking an opaque surface. Some higher powered laser pointers are faintly visible via Rayleigh scattering when viewed from the side in moderately to dimly lit conditions.

High Quality 20mw Blue Violet Laser Specification:
1.Size: φ13.5mm X156mm
2.Material:copper
3.Surface treatment: rubber paint(shell)Electric sand chrome(part)
4.Laser wavelength:405nm
5.Output power:20mw
6. security level: ClassⅢB
7.circuits control: boost constant current circuit
8.Spot form: Punctate+ star
9.Beam type: Continuous linear
10. spot size : 10mm< φ18mm
11.Focus: fixed focus
12.Operating current: low than 60mA
13.Operating voltage: DC=3~3.7V
14. starting voltage: DC=2.6V
15. booting time:0
16.Working temperature:0℃ - 35℃
17. Storage Temperature: -10℃～ 40℃
18.Package: lintbox
19 .Power supply: 2*alkaline cello(including)

Notice:
405nm Wavelength laser (blue-violet light) is very dark, if you need brightness laser pointer, please choose the red laser or green laser.
1.Do not look into the aperture of the laser beam,and do not aim into eye!
2.Do not repeat to switch the laser pointer within 1 min, otherwise it will shorten the lifetime of the laser pointer.
3.Take off the battery and Keep out of reach of children!
4.Charging or changing the battery once the laser beam brightness seriously drop!

NOTE:
1. The low price blue violet laser can bright enough when you light it in normal temperature, so you had better do not light it continually in 30 seconds
2. Avoid direct eye exposure to laser beam (any contact to the human eye can cause permanent damage). Never expose your eyes or anyone else's to the laser beam
Please put it away from children to avoid the danger by contacting. When do not use it, please take off the battery from the laser in order to avoid the damage by the children's contacting
Contradistinction of the green, red and blue violet laser pointer:
Brightness: green>red>blue violet
Price :red< green< blue violet
Poly thermal performance: green< red＝blue violet
Stability: green< red＝blue violet