The HJK-551H+ from Mini Circuits is a RF Mixer with RF Frequency 320 to 550 MHz, LO Frequency 275 to 505 MHz, IF Frequency 10 to 150 MHz, Conversion Loss 7.0 to 8.3 dB, LO Drive - Power 17 to 19 dBm. Tags: Surface Mount, Triple Balanced Mixer. More details for HJK-551H+ can be seen below.