Cheap And Discounts TDA7388 PCB four-channel 4X41W PCB blank board compatible with 7850 50*80*1.6mm Single DC 12-14.5V Wholesale. Buy Directly From Merchant Shenzhen Duoweisi Tech Co., Ltd.. Enjoy ✓Free Shipping Worldwide! ✓90 Days Buyer Protection. ✓Easy Return. ✓Money Back Guarantee.