The DB0426HW1 from Narda-MITEQ is a RF Mixer with RF Frequency 4000 to 26000 MHz, LO Frequency 4000 to 26000 MHz, IF Frequency 0 to 2000 MHz, Conversion Loss 8.5 dB, Noise Figure 10.5 dB. Tags: Module with Connectors, Double Balanced Mixer. More details for DB0426HW1 can be seen below.