It would help if you posted year, since they often change brands of radios.
Also, can't find any Cherokee mp39 model. Are you sure that's the model number?
Dan-Retired California Firefighter/EMT
and Zoe the Wonder Dog(R.I.P.)
2016 PrimeTime TracerAIR 255, pushing a 2014 Ford F150 SCREW XTR 4x4 3.5 Ecoboost w/Max Tow Package