The RMK-3-31+ from Mini Circuits is a Frequency Multiplier with Input Frequency 9 to 12 MHz, Output Frequency 27 to 36 MHz, Input Power 12 to 17 dBm, Harmonics 4 to 60 dBc, Conversion Loss 14 to 17 dB. Tags: Surface Mount. More details for RMK-3-31+ can be seen below.