AUDIO

buzzers

audio indicators

internal drive circuit

drive

Vdc

dc voltage

Vac

ac voltage

audio transducers

external drive circuit

drive

Vo-p

Vp-p

Vdc

for 3 pin piezo ???? непонятно…

piezo elements

external drive circuit

Vp-p

sirens

CEM-1206S	CUI	audio transducer	Vo-p	6V
HCM1206A	JL	audio transducer	Vo-p	5V
L-KLS3-MT-12×09-B	KLS	audio transducer	Vo-p	5V
HCM1203X	JL	audio indicator	Vdc	3V
HCM1201X	JL	audio indicator	Vdc	1.5V