Horn of Blasting

Horn of Blasting is an item which can be used once per to stun all creatures in the affected area and inflictin 2d10 points of damage. The horn may be used by all classes. It can be be found somewhere in the dungeon of the Windspear Hills area. This item appears in Baldur's Gate II: Shadows of Amn and this item will probably appear in Baldur's Gate II: Enhanced Edition.

In-game description
"Horn of Blasting

While many army engineers spent their time perfecting siege equipment, Julius Baggar delved into magical tomes for his engineering insights. Therein he found ancient scriptures that detailed how to make, control, and wield sound waves. The Horn of Blasting was his first and only attempt at taking the theoretical magical knowledge to create a practical new technology. An apprentice blew through the Horn, aimed in the direction of Julius who insisted on a 'useful experiment'. The resulting shockwave that emanated from the horn, first stunned and then tore poor Julius apart."