The SW(B)401B from BOWEI Integrated Circuits is a RF Switch with Frequency 0.5 to 2 GHz, Insertion Loss 1.2 to 1.8 dB, Isolation 65 to 70 dB, Power 30 dBm, Power 1 W. Tags: Module with Connectors, Solid State. More details for SW(B)401B can be seen below.