The 50P-1975 from JFW Industries is a RF Variable Attenuator with Frequency DC to 500 MHz, Attenuation Range 127 dB, Attenuation Step 1 dB, Power 1 W, Insertion Loss 0.27 to 1.25 dB. Tags: Module with Connectors, Programmable, Digital, Computer Controlled. More details for 50P-1975 can be seen below.