The TB0426HW1 from Narda-MITEQ is a RF Mixer with RF Frequency 4000 to 26000 MHz, LO Frequency 4000 to 26000 MHz, IF Frequency 500 to 8000 MHz, Conversion Loss 11 dB, Noise Figure 13 dB. Tags: Module with Connectors, Triple Balanced Mixer. More details for TB0426HW1 can be seen below.