You can connect your TS-990S, TS-890S, TS-590SG, TS-590S, or TH-D72A/E to a PC via a USB cable, or you can connect your TH-K20A/E, TH-K40A/E, TM-281A/E, TM-481A, or other transceivers to a PC via the KPG-22U/46U/186U programming cables by installing the virtual COM port driver in the PC, and then utilize the Radio Control Program, Memory Control Program, or other software we have provided. Thank you for choosing the KENWOOD transceivers.