The DB0440LW1-R from Narda-MITEQ is a RF Mixer with RF Frequency 4000 to 40000 MHz, LO Frequency 4000 to 40000 MHz, IF Frequency 0 to 2000 MHz, Conversion Loss 9 dB, Noise Figure 9.5 dB. Tags: Module with Connectors, Double Balanced Mixer. More details for DB0440LW1-R can be seen below.