this is solar triangle bag with one strap and solar panel is: 1.35W, battery box is: NI-MH battery pack. it is suitable for students using. Solar generated with the high quality battery box, it can charge many brands of the mobilephones, MP3,MP4,IPOD, and so on...

Backpack size (LxWxH): 33x13x46cm
Fabric: 600D polyester, Wider shoulder belt
1 piece solar panel, Panel size: 140mm*95mm
Solar power: 6V, 225 mA, 1.35W
Includes a 1,200mAhNi-MH battery pack
output voltage(max): DC5.8V
output current(max): 400 mA