The ATEK357P4 from ATEK MIDAS is a RF Variable Attenuator with Frequency DC to 20 GHz, Attenuation Range 29.5 to 31 dB, IIP3 44 dBm, Insertion Loss 2 to 5.6 dB, Supply Voltage 5 V. Tags: Surface Mount, Digital. More details for ATEK357P4 can be seen below.