Solar panel power: 20W Solar cell: Monocrystalline silicon Solar panel size: 420*280*3mm Solar panel operating voltage: 18V Solar panel open circuit voltage: 21.6V Solar panel short circuit current: 1.11A (Max) Output port: Dual USB, DC5521 female Product features: integrated 5V voltage regulator module Product use: charge 5V devices such as mobile phones and sports cameras, and charge 12V car batteries such as cars and boat