Features: Deliver clear alerts with the 110dB high decibel output of this SFM 20B active piezoelectric buzzer, featuring a wide 3-24V voltage range for seamlessly integration into automotive systems. Crafted with plastic and metal component, this 23mm buzzer operates at 85dB sound pressure with low 12mA current consumption, offering plugs and play installation for hassle less setups. Ideal for electronics engineers, automotive professional, and DIYer enthusiasts developing alarm systems, industrial equipment, or vehicle upgrades requiring reliable audible signals. Perfect for factory machinery monitoring, construction site safety alerts, and automotive reverse warning systems where noise interferences. Combines energy efficient performances, maintaining stable operation for security devices, robotics, and IoT applications. Specifications: Component: Plastic+Metal Attribute: Black Operating voltage range:3-24V Sound pressure level:≥85dB Frequency range:2kHz±500Hz Suitable for various application scenarios such as alarm systems, household appliances, automotive electronic equipment Practicality: Low power consumption design, long-term use is not easy to heat, easy to install, suitable for integration of multiple circuit boards Package Includes: 5pcs Active Buzzers note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind befores you order. 2.Due to the differences between different monitors, the picture may not reflect the actual color. Thanks for your understandings.