Stable structure: made of ABS material, environmental friendly, flame retardant and durable. An integrated electronic vocalizer consisting of multi-harmonic oscillator, piezoelectric buzzer chip, impedance matching unit, resonator and housing. Rated voltage: 12V Voltage range: 3-24V Rated current(max): 12mA Wire length: 100mm or 4inch Diameter: 23mm or 0.9inch 12 volt buzzer works with DC 3-24V, Sound pressure level: 87 dB. Easy to operate: connected to the rated power supply, the buzzer beeps continuously, simple and convenient to use. Application: Widely used as a buzzer for the circuit of electronic products such as computers, printers, copiers, alarms, electronic toys, automotive electronic devices, telephones, timers, etc. as an audible device. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.