Motorola HKKN4027A Radio-to-PC Programming Cable
Using the CPS software, which can be downloaded for free on the Motorola website, you can program settings from your PC using this cable. Only prestored frequencies, and other settings, can be programmed by an end-user. Custom frequencies must be programmed by a dealer.
Compatible with Motorola RDX series radios: RDU4100, RDU4160d, RDV5100
And compatible with the RM series radios: RMU2040, RMU2080, RMU2080D, RMV2080, RMM2050