More advanced electric inserter. Works at the same speed as a fast inserter. This needs to be connected to the Circuit network or have filters set, otherwise they won't work. You can both filter items and connect to the circuit network at the same time.
When the filter is set, it moves only items which are in this filter (up to five items can be filtered).
When connected to the circuit network, it begins to work immediately, because no condition is set. Set one or more conditions, and the inserter will follow the instructions.
Use the smart inserter to stop production of an item after a certain condition is met (e.g. enough items), when configured as output on an assembly.