The DB1218LW1 from Narda-MITEQ is a RF Mixer with RF Frequency 12000 to 18000 MHz, LO Frequency 12000 to 18000 MHz, IF Frequency 0 to 2000 MHz, Conversion Loss 6.5 dB, LO Drive - Power 10 dB. Tags: Module with Connectors, Double Balanced Mixer. More details for DB1218LW1 can be seen below.