The MRA-42LH from Mini Circuits is a RF Mixer with LO Frequency 1 to 4.2 GHz, IF Frequency 10 to 800 MHz, Conversion Gain 11.5 dB, Noise Figure 8 dB, LO Drive - Power 10 dBm. Tags: Surface Mount, Active Mixer. More details for MRA-42LH can be seen below.