Kepo piezo transducers 28 42 05khz range kepo kpi g4311 6291 the kepo piezo transducer 29 05khz 43mm is able to generate a slow pulse tone when energised by a 12vdc rated voltage outputs of up to 80db12vdc60cm can be achieved suitable for use in professional commercial and industrial applications kepo kpi g4311 6291 piezo transducer 29 05 khz 43mm