The 50P-591 from JFW Industries is a RF Variable Attenuator with Frequency 0 to 3000 MHz, Attenuation Range 0 to 85 dB, Power 1 W, Insertion Loss 2.5 to 4.5 dB, Switching Time 6000 ns. Tags: Module with Connectors, Programmable, Digital, Computer Controlled. More details for 50P-591 can be seen below.