1.Mono-crystalline silicon wafers or multi-crystalline silicon wafers with high conversion efficiency are used,which enables a high solar energy conversion efficiency of over 15% 2.Solar panel specification: 5V/55mA 3.The built-in high capacity rechargeable polymer lithiumion battery: 1000mAH 4.Output voltage: 5.0V-5.5V 5.Output current: 550mA 6.Time for charging a mobile phone: about 60 minutes(the time may vary slightly depending on mobile phones lf different brands and models) 7.Time for charging the built-in battery through solar energy: 8-10hours 8.Time for charging the built-in battery through a compute of AC adaptor:about 4 hours 9.Overall Size: 7.2 x 4 x 1.1 cm 10.Machine Weight:50g 11.Color:Black / silver 12.Packaging:Neutral Package Box 13.Accessories:AC Adapter1PC,AC Input Line1PC,Charger