SainSmart 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 with Red 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. Technical support dedicated from SainSmart