ITEM NAME:2X 300W DC-DC 5V-40V to 1.2-35V Buck Converter Adjustable Buck Power Module VPD.2X 300W DC-DC 5V-40V to 1.2-35V Buck Converter Adjustable Step Down Power Module. Batch number: 300W DC buck converter. 300W DC Buck Converter 2. Type: Power Module. We want to make sure you are happy with our item.