The MXR-20 from RF Bay is a RF Mixer with LO Frequency 350 MHz to 2 GHz, IF Frequency DC to 400 MHz, Conversion Loss 7 to 9.2 dB, LO Drive - Power 7 dBm, P1dB 1 dBm. Tags: Module with Connectors, Double Balanced Mixer. More details for MXR-20 can be seen below.