The GXR-12 from RF Bay is a RF Mixer with LO Frequency 5 to 12 GHz, IF Frequency DC to 4 GHz, Conversion Loss 7 to 10.5 dB, LO Drive - Power 10 dBm, P1dB 8 dBm. Tags: Module with Connectors, Double Balanced Mixer. More details for GXR-12 can be seen below.