Cap structure with sound recording and generating functions and warning lights

A cap structure having sound recording and generating functions and warning lights, said cap structure comprising a cap with a visor and a ring, a recess formed on an underside of said visor, said recess having an inverted fastening means at an outer rim thereof, said recess accommodating a battery set, a circuit board, a buzzer, a select switch and a sound pick-up, light emitting diodes being arranged on an outer rim of said visor at suitable positions and connected to said circuit board, said circuit board being provided with digitalized circuits to provide sound recording and releasing functions, said light emitting diodes for giving out flickering lights on the visor, said cap structure further comprising a cover pressed to fit into said recess and positioned therein by means of said inverting fastening means to tightly seal said recess, with said select switch and said sound pick-up protruding through said cover of said visor.