U+21FF "⇿" Left Right Open-Headed Arrow Unicode Character

U+21FF "⇿" Left Right Open-Headed Arrow is a typographic symbol that represents bidirectional movement or a two way relationship, distinguished by its open arrowheads on both ends of a horizontal line. This character belongs to the Arrows block in Unicode and is often used in mathematical notation, logic, or technical diagrams to indicate a symmetric or reversible connection where neither direction is prioritized. Its design, with hollow triangular tips, sets it apart from solid headed arrows, subtly suggesting openness or potential lack of tension in the opposing flows.