Stable structure: made of high-quality ABS material, environmentally friendly, flame retardant, and durable. Integrated electronic buzzer consisting of multi-harmonic oscillator, piezoelectric buzzer chip, impedance matching unit, resonator, and housing. Rated voltage: 12V; Voltage range: 3–24V; Maximum rated current: 12mA. Wire length: 100mm (4 inches); Diameter: 23mm (0.9 inches). 12-volt buzzer compatible with DC 3–24V. Sound pressure level: 87 dB. Easy to operate: when connected to the rated power supply, the buzzer emits a continuous beep, simple and convenient to use. Application: widely used as an audible alert device in electronic circuits for computers, printers, copiers, alarms, electronic toys, automotive electronic systems, telephones, timers, and other electronic products.