The DM0104MA3 from Narda-MITEQ is a RF Mixer with RF Frequency 1000 to 4000 MHz, LO Frequency 1000 to 4000 MHz, IF Frequency 0 to 1000 MHz, Conversion Loss 6.5 dB, Noise Figure 8.5 dB. Tags: Module with Connectors, Double Balanced Mixer. More details for DM0104MA3 can be seen below.