RioRand RRLM2596 Adjustable 4.0-40V to 1.25-37V 5/12V DC Voltage Regulator Experimental Power Buck Converter with LED Voltmeter Powered by RioRand advanced technology Input Voltage: DC 4.0~40V Output Voltage: 1.25V~37V Output Current: 2A(normal and stable), 3A Max. Display Color: Red