The TTL-1SP4T-183 from Mini Circuits is a RF Switch with Frequency 0.1 to 18 GHz, Insertion Loss 2 to 5.5 dB, Isolation 45 to 80 dB, P1dB 20 to 30 dBm, P1dB 0.1 to 1 W. Tags: Module with Connectors, Solid State. More details for TTL-1SP4T-183 can be seen below.