Quarton Laser Module VLM-650-03 LPA (ECONOMICAL DOT LASER) Economical Red Dot Laser - Low cost solution for consumer grade positioning, measuring, pointing and laser sighting device. Wave length: 650nm. Output power: Class IIIa  less than 5mW. 2.6~5 VDC operation. Beam Divergence (Half Angle) : 0.6 mRad. Dimensions: D7 x 21 mm. Red laser. Ideal Laser module if cost is a very important consideration. Notice: This item is not a laser pen. Laser modules are not supposed to be used for commercial use like normal laser pointers. This module has an integrated optic, laser diode, and APC driver circuit. APC driver circuit enables constant Laser output power. Aspherical plastic lens provides Dot spot.