The 357-021-XXX from Broadwave Technologies is a Fixed Attenuator with Frequency DC to 40 GHz, Attenuation 1 to 30 dB, Power 0.5 W, Peak Power 0.25 kW, Attenuation Accuracy ±0.5 dB, ±0.6 dB, ±0.8 dB, ±1 dB. Tags: Module with Connectors. More details for 357-021-XXX can be seen below.