The GXR-4 from RF Bay is a RF Mixer with LO Frequency 6 to 26 GHz, IF Frequency DC to 8 GHz, Conversion Loss 9 to 12 dB, LO Drive - Power 13 dBm, P1dB 11 dBm. Tags: Module with Connectors, Double Balanced Mixer. More details for GXR-4 can be seen below.