Botswana's music is mostly vocal and performed, sometimes without drums depending on the occasion; it also makes heavy use of string instruments. Botswana folk music has instruments such as setinkane (a sort of miniature piano), segankure/segaba (a Botswana version of the Chinese instrument erhu), moropa (meropa -plural) (many varieties of drums), phala (a whistle used mostly during celebrations, which comes in a variety of forms). Botswana cultural musical instruments are not confined only to the strings or drums. The hands are used as musical instruments too, by either clapping them together or against  (goat skin turned inside out wrapped around the calf area, only used by men) to create music and rhythm. For the last few decades, the guitar has been celebrated as a versatile music instrument for Tswana music as it offers a variety in string which the segaba instrument does not have. The national anthem is "Fatshe leno la rona". Written and composed by Kgalemang Tumediso Motsete, it was adopted upon independence in 1966.