If dot measuring work is processing at quite long work distance and other night vision working occasion, it is a very nice choice to try 980nm infrared laser diode module. It is projecting invisible infrared laser beam directly from 980nm infrared laser diode. Designing with internal metal heat sink cooling system and APC Driving circuit board inside durable metal housing tube, this infrared dot laser is achieving superior nice thermal emitting and extremely stable IR dot alignment continuously. Any time 980nm infrared laser diode module makes sure of APC, ACC driving circuit board. It is preventing increasing temperature and serious electric current impact. Within continuous IR dot projection of 8 to 10 hours and proper use by skilled users, this infrared dot laser assures excellent laser light cycling use and long lifetime. Only if compact size infrared laser gets proper install and adjust of laser beam focus, it makes sure of the most satisfied IR dot indication for all night vision fields perfectly. Technical data: Item: Berlinlasers 980nm infrared laser diode module Output power: 100mW-500mW Laser class: IIIb, IV Optic lens: glass coated lens Adjustable focus: yes Power source: 5V, 9V 1000mA DC input power supply Applications: military targeting, night hunting, infrared laser sight, surveillance and intelligence system etc http://www.berlinlasers.com/980nm-infrared-laser-diode-module