CJRSLRB&reg; LM2596 Adjustable Voltage Regulator 4.0-40V to 1.25-37V DC 36V to 24V to 12V to 5V Variable Volt Power Supply Car Motor Buck Step Down Converter Power Module with Red LED Voltmeter Display The Voltmeter Resolution: 0.1V The Voltmeter Digital Display Range: 0v-45v The Voltmeter Input Voltage Range: Dc 4v-40v Output Voltage: Continuous Adjustable (1.3v-37 V) Output Current: 2a