ITEM NAME:High-efficiency 6-35V to 1-35V Buck/Boost Charge Power Converter Module Aluminum High-efficiency 6-35V to 1-35V Buck/Boost Charge Power Converter Module Aluminum a.imagelink a:hover.imagelink {color:#000000;.This module is a high-efficiency step-up/down regulator automatically modules. The efficiency in step up mode is 90%(INPUT 12V OUTPUT 19V/2A ),and the efficiency in setp down mode is 88%. 1 x DC/DC Buck/Boost Module.