This custom interface cable connects the Retevis RT97S portable repeater's DB9 port and a DMK URIxB USB radio interface (not included). This allows for controlling the repeater from a PC or Raspberry Pi.
The cable allows you to connect your repeater to a URIxB on a Raspberry Pi connected to the myGMRS Network or any other repeater controller or linking systems that use a PC or single-board computer.