The QSOA-521 from QPhotonics is a Fiber Optic Amplifier with Supply Voltage 2.0 - 2.2 V, Saturated Output Power 10 dBm, Saturated Output Power 0.01 W, Wavelength 1020 nm, Operating Temperature 55 to 70 Degree C. More details for QSOA-521 can be seen below.