Input voltage: DC 8-35V (12V/24V can convert to 5V if is lead-acid battery or lithium-ion battery ) Output voltage: DC 5V ( Each port output is 2A/10W ); Total current output is 8A/40W (max) High conversion rate can reach 96%, supporting 4 USB ports and the ability to charge 4 devices simultaneously It is stable to protect your device from overcurrent, overheating, short circuit, low voltage. Use with portable battery the DC converter can use as power bank, suitable for emergency situations, outdoor travelers, camping etc.