The STH-42SF-S1 from ERAVANT is a Waveguide Mixer with RF Frequency 18 to 26.5 GHz, IF Frequency DC to 4 GHz, LO Drive Level 10 to 16 dBm, Input Power -20 to 16 dBm, Operating Temperature 0 to 50 Degree C. Tags: Harmonic Mixer. More details for STH-42SF-S1 can be seen below.