The MPAT-03400420 from Narda-MITEQ is a RF Variable Attenuator with Frequency 3.4 to 4.2 GHz, Attenuation Range 10 to 60 dB, Insertion Loss 2.2 dB, Supply Voltage 0 to 20 V. Tags: Module with Connectors, Voltage Controlled. More details for MPAT-03400420 can be seen below.