The ZFM-4212 from Mini Circuits is a RF Mixer with RF Frequency 0 to 4200 MHz, LO Frequency 0 to 2000 MHz, IF Frequency 0 to 1300 MHz, Conversion Loss 5.44 to 8.5 dB, LO/RF Isolation 25 dB. Tags: Module with Connectors. More details for ZFM-4212 can be seen below.