The ZEM-2B from Mini Circuits is a RF Mixer with RF Frequency 0 to 1000 MHz, LO Frequency 0 to 10 MHz, IF Frequency 0 to 1000 MHz, Conversion Loss 5.74 to 8.5 dB, LO/RF Isolation 30 dB. Tags: Module with Connectors. More details for ZEM-2B can be seen below.