The WS444NKU from Withwave is a RF Switch with Frequency 0.01 to 44 GHz, Insertion Loss 5.6 dB, Isolation 33 to 45 dB, Power 24 to 26 dBm, Power 0.25 to 0.4 W. Tags: Module with Connectors, USB Controlled. More details for WS444NKU can be seen below.