What is the most efficient solution to make highly clear dot alignment at great distance? It is not helpful at all to relying on simple laser pointer or other manual dot aligning device. After the adoption of 100mW green dot laser module, connecting with 9V 1000mA DC input power supply, it keeps work with continuous green dot projection. When it is trying to make continuous dot projection, it is getting enough inner tube space for metal heat sink cooling system and APC, ACC driving circuit board, which is able to work with excellent thermal emitting and high stability green dot projection. After efficient use of glass coated lens and glass window in front of laser beam aperture, 100mW green dot laser module is not affecting by moisture or dust working condition, but just keeping high transmittance laser light emission and highly clear dot positioning result at great distance. At the same time, after quite easy adjustment of laser beam focus, this green dot laser makes the most immediate laser light concentration and the clearest dot positioning results perfectly. Technical data: Item: Berlinlasers 100mW green dot laser module Wavelength: 532nm Optic lens: glass coated lens Adjustable focus: yes Power source: 9V 1000mA DC input power supply Applications: drilling system, laser marking machine, laser engraving, military targeting, industrial laser dot alignment etc http://www.berlinlasers.com/532nm-green-dot-laser-module