The MKG003B from BOWEI Integrated Circuits is a RF Switch with Frequency 10 to 200 MHz, Insertion Loss 1.5 to 2 dB, Isolation 100 to 110 dB, Supply Voltage -5 to 5 V, Switching Speed 200 ns. Tags: Module with Connectors, Solid State. More details for MKG003B can be seen below.