The MR142H from Spectrum Control is a RF Mixer with RF Frequency 4000 to 18000 MHz, LO Frequency 4000 to 18000 MHz, IF Frequency 10 to 5000 MHz, Conversion Loss 6.5 dB, LO Drive - Power 18 dBm. Tags: Module with Connectors, Double Balanced Mixer. More details for MR142H can be seen below.