I have a few of the FDC FD-150A & 450A and found them to be very good little radios and well worth the money. One thing, if the number pad stops working, there is not much to clean. Also, I can not find a mic/speaker pinout to make a data cable to make a packet radio out of them, and I emailed the manufacturer with no answer.
As a stright talkie they are good little radios, but if you try to find info, well,,, good luck.
Karen - WB5GEO