The CITCRYO4-12B from Cosmic Microwave Technology, Inc. is a RF Amplifier with Frequency 2.5 to 15 GHz, Gain 35 dB, Gain Flatness ±2 dB, Noise Figure 0.05 dB, Input Return Loss -15 to -10 dB. Tags: Cryogenic Amplifier, Low Noise Amplifier. More details for CITCRYO4-12B can be seen below.