The MR140M from Spectrum Control is a RF Mixer with RF Frequency 4000 to 18000 MHz, LO Frequency 4000 to 18000 MHz, IF Frequency 1000 to 10000 MHz, Conversion Loss 6 dB, LO Drive - Power 15 dBm. Tags: Surface Mount, Double Balanced Mixer. More details for MR140M can be seen below.