The HSWM4201/2.9-238 from Renaissance Electronics Corporation is a RF Switch with Frequency 18.0 to 26.5 GHz, Insertion Loss 3 dB, Isolation 30 dB, Power 20 to 23 dBm, Power 0.1 to 0.2 W. Tags: Module with Connectors, Solid State. More details for HSWM4201/2.9-238 can be seen below.