Shield of Harmony

Shield of Harmony is a small shield +2 which also provides immunity to charm, confusion and hold person. It has an basic armor class of 3. Unlike other small shield, this shield has +2 armor class bonus against missile attacks. This item appears in Baldur's Gate II: Shadows of Amn and Baldur's Gate II: Enhanced Edition. It's not known where this shield can be obtained.

In-game description
"Audn of the Field, Knight-Champion for the wizard Kekkim, carried this shield for most of his life. It protects the bearer from most forms of mind control, a benefit for a wizard who needed warrior allies to stay faithfully at his side. Both Kekkim and Audn have long since returned to the earth, leaving the shield to whomever might recover it from Kekkim's tower."