The QL83H6S-A/B/C from Quantum Semiconductor International is a Laser Diode with Wavelength 820 to 840 nm, Output Power 20 mW, Output Power 20 mW, Operating Voltage 1.9 to 2.5 V, Operating Current 45 to 70 mA. More details for QL83H6S-A/B/C can be seen below.