It allows users to set frequencies, signaling features (like FleetSync or MDC-1200), and button assignments.
The software is only half the battle. The KPG-99D communicates with the radio via the programming cable. This cable connects to the side mic/SP jack of the TK-x90 radio and terminates in a DB-9 (9-pin serial) connector. Kenwood Kpg-99d Software Download