Cheap And Discounts RPC-MM DB9 COM Port Programming Cable for Motorola Mobile Car Radio GM300 GM328 GM338 GM339 GM340 GM360 GM380 GM3188 GM640 GM660 Wholesale. Buy Directly From Merchant Professional Radio Communction Factory Store. Enjoy ✓Free Shipping Worldwide! ✓90 Days Buyer Protection. ✓Easy Return. ✓Money Back Guarantee.