ITEM NAME:5V 2A Solar Panel Power Bank USB Charge Voltage Controller Regulator 3C Features 1) Automatic identification for phone and other smartphone 2) 5V constant voltage output 3) Automatic restart (after the sun weaker, stop charging, automatic recovery after discharge to strong sunlight) 4) Compatible with most smart phones, tablet, ipad, digital cameras, etc. Specification: Input voltage: 5V-20V Output voltage: 5V Maximum output current: 2000mA Conversion Efficiency:95% Product size: 3.5x3cm/1.38x1.18" Quantity: 1 Pc Note: Please allow 1-3mm error due to manual measurement..Due to the difference between different monitors, the picture may not reflect the actual color of the item. Maximum output current: 2000mA. Product size: 3.5x3cm/1.38x1.18". Conversion Efficiency:95%.