The MX390-1S from R & K Company Limited is a RF Mixer with LO Frequency 2 to 6 GHz, IF Frequency DC to 2.5 GHz, Conversion Loss 8 to 10.5 dB, LO Drive - Power 15 dBm, P1dB 10 dBm. Tags: Module with Connectors, Double Balanced Mixer. More details for MX390-1S can be seen below.