The CFM0204X220 from Cernex Inc is a Frequency Multiplier with Input Frequency 2 to 4 GHz, Output Frequency 4 to 8 GHz, Output Power 20 dBm, VSWR 2.00:1, Frequnecy 2 to 4 GHz. Tags: Module with Connectors, Active, Passive. More details for CFM0204X220 can be seen below.