The percussion instruments are castanets mounted onto a frame ("machine castanets") which makes them easier to play.
Castanets held in the hand are one of the standard instruments in Spanish flamenco music. They also belong to the standard percussion instruments used in orchestras, particularly for anything with a Spanish flair, but also as an ...
"Zoom" is from the Commodores' fifth studio album "Commodores" released 1977.
The members of the Commodores at this time were:
Lionel Richie – vocals, saxophone (not on "Zoom"), keyboards
Thomas McClary – vocals, guitar
Milan Williams – keyboards
Ronald LaPread – bass guitar
William King – trumpet
Walter Orange – drums, vocals, ...