Description Are you looking for a professional, yet reasonable piezo buzzer? Are you in search of a sturdy, trustworthy tool that can do multiple jobs at once? If yes, look no further! Our professional alarm buzzer must meet your needs, this piezo buzzer is one of the best choices for you. Feature - Color: Black - Material: ABS, copper - Size:2.20X2.20X1.00cm/0.86X0.86X0.39in - Sound Level: 80 dB - Rate Voltage: 12V DC - Operating Voltage: 3 - 24V - Frequency: 3000 + / - 500Hz - The shell is made of high grade engineering plastic, and the built-in chip is more sensitive to detect objects. - Microprocessor, responsive and rapid, improve the horn load capacity, can protect the current short circuit caused by overload, suitable for a variety of complex environments. - Clear and bright sound, strong penetrating power so that the ear can not ignore the rapid acceptance of warning information. - Fit for computers, printers, copiers, alarms, electronic toys, automotive electronics, telephones, timers and other electronic products as a sound device. - Small and compact size, light in weight, you can carry and use it wherever you go. Package list: 5 x piezo buzzers