This magical instrument can be struck only once every turn. Its resonant tone lasts for three full rounds. 

While the chime is resonating, no spell requiring a verbal component can be cast within a 30-foot radius of it unless the caster is able to make a saving throw versus breath weapon. 

After its effects fade, the chime must be rested for at least 7 rounds. 

If it is struck again before this time elapses, no sound will issue forth, and a full turn must elapse from that point in time before it can again be sounded.