The SJ-T-4000-8000-50D from A-Info is a Fixed Attenuator with Frequency 4 to 8 GHz, Attenuation 0 to 50 dB, Power 0.5 W, Insertion Loss 3.5 dB, Operating Temperature -55 to 80 Degree C. Tags: Module with Connectors. More details for SJ-T-4000-8000-50D can be seen below.