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:

Once you have assembled your vario adjust the hardware settings using the manual below and software for your platform.

Hardware Settings Manual

The Hardware Settings Manual provides a comprehensive description of the range of hardware settings available on the device.

BFV_HardwareSettings_Manual_v1.6.pdf (updated Oct 2016)