... 635nm are widely used in laser display, spectrum analysis,measurement,biomedicine,laser medical equipment, laser light show,ect.Specifications: ModelDT635D3W ... you with below kinds of laser module.Shape of light: dot, single line,cross line ,collimated expanded ... 405nm -1064nmThe application of the laser can be used in industrial, architectural, medical, scientifics,stage lights,enterainment, military ...