The WSLP-635-005m-4-PD from Wavespectrum Laser Inc. is a Laser Diode with Wavelength 630 to 640 nm, Output Power 0.005 W, Operating Voltage 2.3 V, Operating Current 0.07 A, Threshold Current 50 mA. More details for WSLP-635-005m-4-PD can be seen below.