The MX2J020040 from Narda-MITEQ is a Frequency Multiplier with Input Frequency 1 to 2 GHz, Output Frequency 2 to 4 GHz, Input Power 3 to 8 dBm, Output Power 10 dBm, Harmonics 20 dBc. Tags: Module with Connectors, Passive. More details for MX2J020040 can be seen below.