Kepo minature buzzers 23 03khz27 03khz31 05khz kepo kpx g0903b 6392 the kepo minature buzzer 27 03khz is an electronic buzzer that offers a high but rich sound able to generate a continuous pulse tone when energised by a 3vdc rated voltage outputs of up to 75db3vdc10cm can be achieved suitable for use in professional commercial and industrial applications kepo kpx g0903b 6392 miniature buzzer 27 03 khz