CHIRP

Have acquired a set of Carrborg CV5Pro Fm talkies. They are currently sold on Amazon, but I can't get any info on programming from users or vendor. They are UHF and appear similar to most of the other Chinese radios (ie Baofeng) of this class except the antenna is not removeable. The brief info sheet says they are programmable, but gives no other info. They are 16 ch and are programmed in the 450-460Mhz range on freq. not allocated for general use. I suspect that they are a rebranded clone of a more familiar radio, but can't figure it out. I have tried using a Baofeng programming cable and several of the different models in Chirp, but no luck in communication with the HT. Any idea which model in Chirp to use for programming? Or is this going to require a new data set?