To operate this board you will need a power supply, Pine advises a "5V 15A power supply with 6.3mm OD/3.0mm ID barrel type DC Jack" which is also available in the store (EU / US versions). There are other ways to power this board, but they are not described here yet.
The board works best when it is protected by a (mITX)case, and has some airflow provided by a fan.
Each SOPINE module can use cooling, both by a casefan, and by using heatsinks on the individual modules. At least the A64 could use some cooling.
The first slot can use a eMMC module, which are in the store in 16GB / 32GB / 64GB / 128GB sizes. The modules can be used as a USB stick using a USB adapter. (The eMMC is also readable with the Hardkernel eMMC to microSD converter.)
Two AA batteries, to allow the SOPINE nodes to retain the RTC (Real Time Clock) time and date information when the power is disconnected.