New 650nm <5mW Laser Cross Module w/ driver This 650nm laser diode is an industrial electronic component and used for as Industrial testament, Lab, DIY. The laser module is and precise and sensitive optical instrument. Before carrying on some laser DIY activities, please read about the technical information first and protect your eyes before laser ray. Be sure the operator has experience in optics DIY or testing. Red wire "+" pole; Black wire "-" pole.