The HJK-251H+ from Mini Circuits is a RF Mixer with RF Frequency 40 to 250 MHz, LO Frequency 10 to 220 MHz, IF Frequency 10 to 90 MHz, Conversion Loss 7.0 to 8.5 dB, LO Drive - Power 19 dBm. Tags: Surface Mount, Triple Balanced Mixer. More details for HJK-251H+ can be seen below.