The MAX4J050055 from Narda-MITEQ is a Frequency Multiplier with Input Frequency 1.25 to 1.375 GHz, Output Frequency 5 to 5.5 GHz, Input Power 3 to 8 dBm, Output Power 6 dBm, Conversion Loss 3 dB. Tags: Module with Connectors, Active. More details for MAX4J050055 can be seen below.