Pls Notice:1.This device can not store electricity， but only can charge Ur cell phones in the sun. And this item must Under the strong light ， Otherwise the voltage is very smalland many smartphone have Battery protection maybe can't charge it.2. Phone is not includedDescription:Operating voltage: 6 vPower:3.5WWork: current 580-600mAoutput:USB 2.0Net weight: about 100 g Size: 165 * 135 * 2 mmApplications :Suitable for: digital products charge ，phone MP3 MP4 PDA TabletPackage included :1 solar panel USB Solar Battery Charger