专业生产ZSFD-0810A型手机内置发电机。The dynamo ZSFD-0810A is a kind of dynamo which can be enclosed directly in the cell phone.And we are the first one in the world to put them into production.Then output detail of the dynamo  is below:
Rated Rotating Speed:3000 rpm
DC Voltage Output:4.2v
Rated Current Output:220 mA
Dimension:49mm(L)X36mm(W)X13.5mm(H)