Precisely Measured 50mW 405nm Violet Laser Diode Module If users are looking for easy and highly precise dot alignment, although it is not easy to reach with any manual dot projecting tool, it would be much better solution to apply a 50mW 405nm violet laser diode module. It enables easy and convenient violet laser beam and violet dot directly from inner 405nm violet laser diode. When compact size violet laser gets proper install and adjust of beam focus, it achieves highly precise dot projecting with good beam stability in continuous use. This 50mW 405nm violet dot laser module employs qualified glass coated lens. It is only projecting moderate brightness violet laser beam, however, it is still getting quite special dot measurement for biomedical, laser medical therapy instrument and other high tech fields. When compact structure violet laser gets proper installation, within the maximum installed distance of 3 meters, it makes easy and no barrier dot alignment in distance perfectly. Technical data: Item: Berlinlasers 405nm 50mW violet laser diode module Laser class: IIIb Optic lens: glass coated lens Power source: 9V 1000mA DC power supply Focus adjustable: yes