The FA-B1B25A-4G2W15/H44-H4 from Rosnol is a Fixed Attenuator with Frequency DC to 4 GHz, Attenuation 15 dB, Power 2 W, Attenuation Accuracy ±0.4 to ±0.5 dB, Operating Temperature -55 to 130 Degree C. Tags: Module with Connectors. More details for FA-B1B25A-4G2W15/H44-H4 can be seen below.