The LSJ-DC/18-30-4 from Leader-MW is a RF Variable Attenuator with Frequency DC to 18 GHz, Attenuation Range 0 to 30 dB, Attenuation Accuracy 1.5 dB, Insertion Loss 4.5 dB, Switching Time 250 nS. Tags: Module with Connectors, Rotary, Digital. More details for LSJ-DC/18-30-4 can be seen below.