how to build a bicycle generator

Brand Name:CHIRREY

Model Number:Y1DS

Place of Origin:CHINA

Product Information : folding bicycle is a bicycle designed to fold into a compact form, facilitating transport and storage. When folded, the bikes can be more easily ebikeried into buildings, on public transportation (facilitating mixed-mode commuting...

Brand Name:skymen

Model Number:JP-720ST

Place of Origin:China Mainland

...: Stainless steel 304 + 201 Shell; Ultrasonic frequency: 28khz Transducers; With 72 pieces transducers; Ultrasonic power 9KW; Generator power 220V, 50/60HZ Working voltage: 380V 50HZ;