The MAX4M129138 from Narda-MITEQ is a Frequency Multiplier with Input Frequency 3.24 to 3.45 GHz, Output Frequency 12.96 to 13.8 GHz, Input Power 8 to 10 dBm, Output Power 8 dBm, VSWR 2.00:1. Tags: Module with Connectors, Active. More details for MAX4M129138 can be seen below.