... height:15mm frequency:3200HZ voltage:12V self-drive piezo buzzerrated voltage(VDC):12Voperating voltage(VDC):3- ... point may come off.5. The standard self-drive circuits utilizes transistor switching , the circuit constants for ... of alarms, satellite receivers , microwave ovens, computers, calculators, digital cameras, electronic dictionaries, ultrasonic planimeters, medical devices, micro- ...