Rattle called a old musical instrument in the form of ring, or horseshoe, which contained metal plates, threaded on rods, which blew shaking. The Sitra is considered a percussion instrument idiophones family, in the range of percussive indirectly, or shaken, how maracas, castanets and bells.

It was widely used in religious festivals of ancient Egypt, the Romans who copied it. He was considered an attribute of the goddess Hathor, and was also related to the goddesses Isis and Bastet Bat.

Today still preserved specimens and ceramic representations of this instrument in various museums, including the National Archaeological Museum of Spain, British Museum, Louvre, etc..