The TLLA4G8G-37-00-Cryo from Talent Microwave Inc is a RF Amplifier with Frequency 4 to 8 GHz, Gain 40 dB, Gain Flatness ±1 dB, Input Return Loss -6 dB, Supply Voltage 0.6 to 1.2 V. Tags: Benchtop / Rackmount, Low Noise Amplifier, Cryogenic Amplifier. More details for TLLA4G8G-37-00-Cryo can be seen below.