SMAKN UPS Uninterruptible 24 Volt Battery Charging 110V/220V AC to 27V 4A DC Converter Regulated Switched Power Supply Input voltage: 110V-240VAC, 50/60Hz Output : DC 27V/4A With UPS function for battery charge With battery interface, the maximum can be equipped with 24V7AH lead-acid battery With short circuit, overcurrent, overvoltage protection.