For the RT15, stick to the official . It is free, regularly updated, and fully featured.
While we highly recommend the official CPS, some users explore alternatives. Rt15-cps Software Download
Click on the "Download" button to begin downloading the Rt15-cps software. The software package may be compressed, so ensure that you have sufficient disk space to extract the files. For the RT15, stick to the official
Some users prefer RT Systems for a more user-friendly interface, though it is typically a paid alternative ($25). To successfully program the radio, you will need: Hardware : A Retevis-compatible 2-pin programming cable. For the RT15