The BlueFlys are shipped as a completed circuit board with the components listed in the product page. Shipping in this form is much cheaper as it makes the package less than 20mm thick, and I can use the saved time to focus on making more circuit boards. See these blog posts for assembly instructions:
- BlueFlyVario_Bluetooth_USB_v12 Assembly.
- BlueFlyVario_TTL_GPS_v11 Assembly with the Kobo Glo for an example and links to many other blog posts for other models.