This is a housing for the USB-connector which mounted to the Aheadtube in a bicycle.
To use this you also have to etch and drill the circuit board from the picture in the right dimension.

You will also need:

• Ahead expander like this one
• chager electronic (you can build it like this one)
• USB connector
• circuid board material
• stuff for etching ( be carefull with that !!! )
• soldering iron
• some cables
• 2 * M3 screw
• 2 * M3 nut