Cheap And Discounts DC-DC Step Down Buck Converter Module LM2596 3.2V-40V to 1.25V-35V Adjustable Power Voltage Regulator Step-down Transformer Wholesale. Buy Directly From Merchant Diy Box Electronics Mall. Enjoy ✓Free Shipping Worldwide! ✓90 Days Buyer Protection. ✓Easy Return. ✓Money Back Guarantee.