... 3.high efficiency 4.high reliability 635nm 5mW Laser Diode 5.6mm TO-18 Package [JG20] Safety ... Instructions:1 Note: This laser diode may do harm to human eyes, when the laser tube is working, pay ... environment to prevent condensation, condensation may damage the laser tube.4, At high temperatures, it will ... by the static electricity, resulting in the laser tube failure. Wear anti-static wrist strap ...