The Reader is a block in Refined Storage.
When opened, all the reader / writer channels on the Refined Storage network are visible. The player can create or remove channels to their liking.
The Reader is a block that takes items, fluids, energy and / or a redstone signal. The data will be transmitted to the configured channel and can be read out with a Writer.
Note that the Reader doesn't auto-extract any of the supported types. You have to insert it manually.