It is a machine with two Output facings. One for the Filtered Objects (Blue), which can be changed to any direction, and the default output (Red) if the filter doesn't accept the item or the target inventory is full. This option can be set with a Wrench like with any other Machine.
Both Outputs are also outputting EU like with any other automation device.
Max in/out 32 EU
Many villagers often refer to it speaking to them saying, "Fill my holes with cables and we'll see what happens!".