SMAKN Dc-dc Synchronous Rectifier Buck Power Converter Voltmeter Input 4.5-24v to Output 0.93v-20v(Green) Input voltage: 4.5-24V(Maximum limit voltage is 24 v, please make allowance to use or be damaged) Output power: 20W maximum Output voltage: 0.93v-20v (step-down mode, The input voltage must be a minimum of 2v) Output current: Continuous output 2A Ripple frequency: About 330KHZ