The MXR-5J from RF Bay is a RF Mixer with LO Frequency 2 to 500 MHz, IF Frequency DC to 500 MHz, Conversion Loss 6 to 8 dB, LO Drive - Power 10 dBm, P1dB 5 dBm. Tags: Module with Connectors, Double Balanced Mixer. More details for MXR-5J can be seen below.