1,white small piezo siren 2,Sound:HI-LO tone, single tone, ... ,DC 12V 24V 4,For Security Alarm System 5,waterproof White Piezo buzzer(waterproof piezo siren)China Direct Supplieritem: PS-104Operating Voltage: DC ... HI-LO tone, 1 tone or 6 tone,Color: Black/White/Red/GreenMaterial:ABS Clear Picture for Showing the shape of ... Product in Details: china hot sale 12v 24v white piezo alarm siren PS-104