Quarton Laser Module VLM-650-18 LPA (Ultra-Far Range Red Laser) Red Dot Laser-glass aspherical lens with long back focus length function to generate smallest spot at long distances. Ideal use for long distance position, targeting, professional laser sight and security monitor. Wavelength:650nm. Beam Divergence: 0.2 mRad. Output power:2.5mW, Class IIIa. 2.6~5 VDC operation. Dimensions: 13 x 43.5 mm (0.512" x 1.713") Ultra-Far Range Dot Laser. Diffraction Limited Lens to achieve a near-collimated Laser system, which can be sighted Ultra-Far distance range. This module has integrated optic, laser diode, and APC driver circuit. APC Driver Circuit enables the Laser output power safe and constant. Includes patented solid brass structure for the best shock resistance and better heat transfer consideration. Glass-base hybrid lens provides Ultra-Far range Dot Laser. Notice: This item is not a laser pen. Laser modules are not supposed to be used for commercial use like normal laser pointers.