The 50BA-004-63 from JFW Industries is a RF Variable Attenuator with Frequency 30 MHz to 3 GHz, Attenuation Range 63 dB, Attenuation Accuracy 0.2 to 0.5 dB, Power 0.5 to 2 W, Insertion Loss 4.2 to 4.5 dB. Tags: Benchtop, Programmable, System, Digital, Computer Controlled. More details for 50BA-004-63 can be seen below.