Cheap And Discounts ZK-AM100 Bluetooth-compatible Amplifier Board HiFi Stereo 2.1 TPA3116D2 2X50W+100W Audio Power Amplifier Module Wholesale. Buy Directly From Merchant Diy Box Electronics Mall. Enjoy ✓Free Shipping Worldwide! ✓90 Days Buyer Protection. ✓Easy Return. ✓Money Back Guarantee.