CC Buck Converter, DROK DC-DC Constant Current & Voltage Regulator Board 5V-36V 24V to 1.25V-32V 17V 12V 5V Step Down Transformer 5A 75W High Power LED CC Driver Module Battery Charge for Solar Panels DROK buck converter input voltage range is DC 5V-36V, output voltage range is DC 1.25V-32V continuously adjustable, default output 17V, max output current is 5A(please use it within 4.5A). Equipped with Multimeter: the voltage regulator module is with voltmeter/ammeter/power meter, can be directly used without external multimeter. Application: our buck converter with over current protect function; battery charger for solar panels, wind driven generator.; high power LED constant current driver module. With USB Port: the step down converter is with USB port, can be used to charge for digital products.(Note: USB output voltage is the same as the module voltage output, please check before using.) Constant Current & Constant Voltage Mode: the reducer module is with two kinds of mode: constant current and constant voltage, the indicator light will indicate which mode it is under.