This is not a complete project yet, and may not be the final parts. If you are not confident in your electronics abilities (un-shielded mains voltage!) It would be best to wait for further progress. There is no support for this dev kit other than the forums, it is a project in progress.
For those that might want to follow along this includes the main components,
10K & 1K resistors
660 sensor cap (internally mounted for now)
Optional - Custom PCB kit comes with all of the above plus the custom PCB with it's required headers and requires soldering.
You will need jumpers and wires of your own, soldering recommended, miscellaneous other parts, paint. DEV kit....