The ZEM-4300MH from Mini Circuits is a RF Mixer with RF Frequency 0 to 4300 MHz, LO Frequency 0 to 300 MHz, IF Frequency 0 to 1000 MHz, Conversion Loss 6.42 to - dB, LO/RF Isolation 40 dB. Tags: Module with Connectors. More details for ZEM-4300MH can be seen below.