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• Buzzer
  1. SMD Electro-Magnetic Buzzer
  2. SMD Piezoelectric Ceramic Buzzer
  3. Electro-Magnetic Buzzer
  4. Electro-Magnetic Active buzzer
  5. Dynamic Buzzer
  6. Mechanical Buzzer
  7. Piezoelectric Ceramic Buzzer
  8. Piezoelectric Active Buzzer
• Speakers
  1. Mylar Speaker
  2. Other Speaker
• Ultrasonic Sensor
• Microphone