The 50P-1621 from JFW Industries is a RF Variable Attenuator with Frequency 20 to 500 MHz, Attenuation Range 63 dB, Attenuation Step 1 dB, Power 0.01 W, P1dB 10 dBm. Tags: Module with Connectors, Programmable, Digital, Computer Controlled. More details for 50P-1621 can be seen below.