Operating temperature: -15°C to +55°C
Dynamo: 40.2 x 94.3 mm, Dynamo (with mountings): 250g                                  

Connector: USB 2.0 interface,
Charger: 71 x 33 x 22 mm     Charger: 36 g  
Phone holder: 141 x 21 x 25 mm    Phone holder: 11.5 g      
Connecting cables: 800- 1,000 mm 

     
The dynamo generates power by the movement of the wheel and then converts the kinetic energy to electric energy. The AC from dynamo is changed to DC through the transformer. The DC turns to 5V working voltage by voltage regulator tube. We have different rotary brackets used for I-phone III, I-phone IV and any other models. The adjustable screw could be operated by hands.