If users are looking for an easy and high precision dot alignment, always trying to work for quite long time, it is an easy job to use of a 30mW green laser diode module. It is emitting the most visible green laser beam after its use of 9V 1000mA DC power supply. It keeps work with the lowest laser beam divergence of less than 1mrad and special TEM00 laser beam mode, it is able to work with the most precise and the brightest green dot alignment in distance. In various industrial dot measuring work fields, 30mW green laser diode module adopts inner metal heat sink cooling system and APC driving circuit board inside durable metal housing tube. It is able to work with high laser beam stability, and highly clear green dot alignment in continuous use. This compact size green dot laser should gets proper installation and adjustment of laser beam focus, it makes sure of the most precision dot measurement for all precise device manufacturing works. Technical data: Item: Berlinlasers 30mW green laser diode module Laser class: IIIb Optic lens: glass coated lens Adjustable focus: yes Power source: 9V 1000mA DC power supply Tube diameter: 26mm diameter aluminum alloy housing tube Applications: drilling system, military targeting, laser marking, laser engraving, lab experiment etc http://www.berlinlasers.com/532nm-green-laser-diode-module