Product Description：
1. Buzzer: The buzzer is an integrated electronic structure, DC power supply, widely used in computers, printers, copiers, alarms, electronic toys, automotive electronic equipment, telephones, timers, etc. A sound generating device for an electronic product.
2. Buzzer Category: mainly divided piezo buzzer and two types of electromagnetic buzzer.
3. Buzzer circuit graphic symbols: the buzzer in the circuit by the letter “H” or “HA” (the old standard with the “FM”, “LB”, “JD”, etc.), said.
