Quarton Laser Module VLM-650-02 LPA (ADJUSTABLE DOT LASER) Wave length: 650nm. Output power: Class IIIa  less than 5mW. 2.6~5 VDC operation. Dimensions: D10.5 x 26 mm. Red laser. Adjustable focus (Focus range 100mm ~ Infinity) Laser. This module has an integrated optic, laser diode, and APC driver circuit. APC driver circuit enables constant Laser output power. Includes patented solid brass structure for the best shock resistance and better heat transfer consideration. Aspherical plastic lens provides Dot spot. Notice: Laser modules are NOT laser pens. Laser modules are NOT supposed to be used for commercial use like normal laser pointers.