The HSWM2801/2.9-239 from Renaissance Electronics Corporation is a RF Switch with Frequency 26.5 to 40 GHz, Insertion Loss 3.5 dB, Isolation 28 dB, Power 20 to 23 dBm, Power 0.1 to 0.2 W. Tags: Module with Connectors, Solid State. More details for HSWM2801/2.9-239 can be seen below.