The RMK-3-812+ from Mini Circuits is a Frequency Multiplier with Input Frequency 1.8 to 2.7 GHz, Output Frequency 5.4 to 8.1 GHz, Input Power 0 to 6 dBm, Harmonics 6 to 40 dBc, Conversion Loss 16 to 21 dB. Tags: Surface Mount. More details for RMK-3-812+ can be seen below.