The FARL-5S-635-40-A from FrankFurt Laser Company is a Laser Diode with Wavelength 635 to 640 nm, Output Power 0.005 to 0.006 W, Threshold Current 19 to 23 mA, Output Power (CW) 0.005 to 0.006 W, Operating Temperature -10 to 40 Degree C. More details for FARL-5S-635-40-A can be seen below.