The FARL-5S-635-40 from FrankFurt Laser Company is a Laser Diode with Wavelength 635 to 640 nm, Output Power 0.005 to 0.007 W, Threshold Current 23 to 30 mA, Output Power (CW) 0.005 to 0.007 W, Operating Temperature -10 to 40 Degree C. More details for FARL-5S-635-40 can be seen below.