The ATEK353N4 from ATEK MIDAS is a RF Variable Attenuator with Frequency 0.01 to 32 GHz, Attenuation Range 46 to 51 dB, IIP3 29 dBm, Insertion Loss 1.5 to 4.3 dB, Supply Voltage -3 to 0 V. Tags: Surface Mount, Voltage Controlled. More details for ATEK353N4 can be seen below.