The 50PA-127-XX from JFW Industries is a RF Variable Attenuator with Frequency 698 MHz to 3 GHz, Attenuation Range 127 dB, Attenuation Accuracy 0.5 dB, Power 0.1 to 0.32 W, Insertion Loss 3 to 6.5 dB. Tags: Rackmount, Programmable, Multi-Channel, System, Digital, Computer Controlled. More details for 50PA-127-XX can be seen below.