The M4-0140LK from Marki Microwave is a RF Mixer with RF Frequency 1 to 40 GHz, LO Frequency 1 to 40 GHz, IF Frequency DC to 500 MHz, Conversion Loss 9.5 to 12 dB, LO Drive - Power 10 to 13 dBm. Tags: Module with Connectors, Double Balanced Mixer. More details for M4-0140LK can be seen below.