# Precisions attribute {#openvino_docs_IE_DG_lpt_Precisions}

ngraph::PrecisionsAttribute class represents the `Precisions` attribute.

The attribute defines precision which is required for input/output port or an operation.

| Property name | Values                                       |
|---------------|----------------------------------------------|
| Required      | Yes                                          |
| Defined       | Operation, input port, output port           |
| Properties    | precisions                                   |