This item is a Piezo , well-made of , this item is and practical use. Designed with 2-wire pigtails, which is a product for industrial use. The features low voltage, low power consumption and high voice pressure. Features -Color: Black -Material: PPO -Size: 2.20X2.20X1.00cm/0.86X0.86X0.39in - Manufactured with high-grade material, sturdy and practical, which is not easy to deform. - It's a kind of integrated electronic , with stable performance and . - The have good characters like small cubage, low wastage and high voice pressure. - Suitable for most occasions, 2 wire connectors design, convenient for connecting. - Enough quantities of Piezo buzzers are provided, which can satisfy your daily needs. Specification -Rated Voltage: 12V -Voltage Range: 3-24V -Rated : <=12mA -Sound Output: >=85dB - Frequency: 3000±500Hz -Operating Temperature: -20~+45 degree centigrade -Storage Temperature: -20~+60 degree centigrade Package list: 3 Piezo Buzzers