The MXR-42M from RF Bay is a RF Mixer with LO Frequency 5 MHz to 4.2 GHz, IF Frequency 5 MHz to 3.5 GHz, Conversion Loss 9.8 to 11.8 dB, LO Drive - Power 13 dBm, P1dB 9 dBm. Tags: Module with Connectors, Double Balanced Mixer. More details for MXR-42M can be seen below.