The RK-5+ from Mini Circuits is a Frequency Multiplier with Input Frequency 10 to 800 MHz, Output Frequency 20 MHz to 1.6 GHz, Input Power 10 to 20 dBm, Harmonics 15 to 30 dBc, Conversion Loss 12.5 to 16 dB. Tags: Plug in. More details for RK-5+ can be seen below.