DROK Mini DC Buck Converter 4.75-28V to 1.2-25V 3A Adjustable Voltage Regulator, 12V 24V to 5V Step Down Variable Volt Power Supply Stabilizers Car Battery Module Properties: non-isolated buck module Input voltage: DC 4.75-28V Output voltage: DC 1.2-25V ( continuously adjustable ) Output Current: MAX 3A Conversion efficiency: up to 95%