SMAKN&reg; CC CV Buck Dc Voltage Converter LED Driver 6v/12v/24v Battery Charging Regulated Power Supplies Dc-dc Adjustable Step-down Power Converter Module Input 5-35v Output 1.25-30v Input voltage: 5V-35V Output Voltage: 1.25V-30V Module Properties: non-isolated constant current and voltage module Output current: 3A maximum adjustable Conversion efficiency: 92% (maximum)