The M4-0140 from Marki Microwave is a RF Mixer with RF Frequency 1000 to 40000 MHz, LO Frequency 1000 to 40000 MHz, IF Frequency DC to 700 MHz, Conversion Loss 8.5 dB, LO/RF Isolation 30 dB. Tags: Module with Connectors, Double Balanced Mixer. More details for M4-0140 can be seen below.