Input voltage: DC 12-24V QC 2.0 port Rated output DC voltage range and output current: 5V/2.1A 9V /1.67A 12V/1.25A If your devices do not support quick charge 2.0, the QC 2.0 port output will be adjusted to 5V/2.1A. Working temperature: 0~40'C Working humidity: 35%~85% Storage temperature: -20~70'C Storage humidity: 5%~95% Fast: Qualcomm Certified Quick Charge 2.0 Technology reduce the charging time by up to 75% Safe: Over-current, over-charging, short-circuit protection will make the charge safely, without any risk of overheating or damaging your devices. Less time charging. More time doing. Qualcomm Quick Charge is the next generation of fast charging technology for devices powered by Qualcomm Snapdragon processors. Charge up to 75% faster. In laboratory tests using a 3300mAh battery, a Quick Charge 2.0 enabled device went from 0% to 60% charge in 30mins, while a device without Quick Charge 2.0 using a conventional (5 volt, 1 amp) charger achieved just a 12% gain in the same 30mins. A device with Quick Charge 1.0 managed a 30% charge in that time period.