The R12-SF28018 from Talent Microwave Inc is a RF Switch with Frequency DC to 18 GHz, Insertion Loss 0.2 to 0.4 dB, Isolation 60 to 70 dB, Supply Voltage 12 V, Supply Current 190 mA. Tags: Module with Connectors, Electro-Mechanical. More details for R12-SF28018 can be seen below.