The ZFM-4H from Mini Circuits is a RF Mixer with RF Frequency 0 to 1200 MHz, LO Frequency 0 to 5 MHz, IF Frequency 0 to 1200 MHz, Conversion Loss 4.97 to 9 dB, LO/RF Isolation 35 dB. Tags: Module with Connectors. More details for ZFM-4H can be seen below.