The 351-129-XXX from Broadwave Technologies is a Fixed Attenuator with Frequency DC to 2.5 GHz, Attenuation 0 to 40 dB, Power 1 W, Attenuation Accuracy ±0.5 dB, ±0.75 dB, ±1 dB, Operating Temperature -55 to 100 Degree C. Tags: Module with Connectors. More details for 351-129-XXX can be seen below.