The SR-B310-4S from UMCC is a RF Switch with Frequency 20 MHz to 6 GHz, Insertion Loss 2.3 to 2.8 dB, Isolation 70 to 80 dB, Power 27 to 30 dBm, Power 0.5 to 1 W. Tags: Module with Connectors, Solid State. More details for SR-B310-4S can be seen below.