The M1-0520 from Marki Microwave is a RF Mixer with RF Frequency 5000 to 20000 MHz, LO Frequency 5000 to 20000 MHz, IF Frequency DC to 4 GHz, Conversion Loss 6.5 dB, LO/RF Isolation 35 dB. Tags: Surface Mount, Double Balanced Mixer. More details for M1-0520 can be seen below.