Wikipedia
Kakaki
The kakaki is a three to four metre long metal trumpet used in Hausa traditional ceremonial music. Kakaki is the name used in Chad, Burkina Faso, Ghana, Benin Niger, and Nigeria. The instrument is also known as waza in Chad and Sudan, and malakat in Ethiopia.
An ancient instrument, the kakaki was predominant among Songhai cavalry. Its sound is associated with royalty and it is only played at events at the palace of the king or sultan in Hausa societies. It is used as part of the sara, a weekly statement of power and authority. Kakaki are exclusively played by men.