Parameter : Class IIIA Wavelength:650nm Output Power:5mw Working Voltage:3 - 5V Working Temperature:+15 ℃~+35 ℃ Laser Shape:cross Focusable:Yes Material and Color:Metal Operating Current:I < 45mA Dimensions:12*12*35mm Feature: This 650nm laser diode is an industrial electronic component and used for as Industrial testament, Lab, DIY. It is 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. Care Instruction: Please keep the lens clean to make the laser beam clear and bright. 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. Package: 2pcs 5mW 650nm Focusable Red Laser cross Module