The CFM0304X420 from Cernex Inc is a Frequency Multiplier with Input Frequency 3 to 4 GHz, Output Frequency 12 to 16 GHz, Output Power 20 dBm, Harmonics 7 dBc, VSWR 2.00:1. Tags: Module with Connectors, Active, Passive. More details for CFM0304X420 can be seen below.