Kimdrox Adjustable Voltage Regulator DC/DC Buck Converter DC 4.0-40V to 1.25-37V 5/12V Volt Stabilizers Car Battery Step Down Variable Volt Power Supply with Red Digital LED Panel Voltmeter Display Module Model:LM2596 Buck Converter+Voltmeter Input Voltage: DC 4.0~40V Output Voltage: 1.25V~37V Output Current: 2A(normal and stable), 3A Max. Display Color: Red