<ul><li>BEEP TONE SPEAKER-- Active piezo electronic buzzer supports DC 3- 24V wide voltage power .</li><li>CLASSROOM ELECTRIC BUZZER-- Complete drive circuit incorporated for direct operation from DC .</li><li>EMERGENCY BUZZER-- Manufactured with high- grade material, sturdy and practical, which is not easy to deform.</li><li>DIY BUZZER ALARM-- Manufactured with high- grade material, sturdy and practical, which is not easy to deform.- Sound Output: 85dB</li><li>AC BUZZER ALARM-- Widely used in computers, printers, copiers, alarms, electronic toys, automotive electronic equipment, telephone, timer and other DIY electronic products as a sound device.</li></ul><br><br>

TOYANDONA 5sets Practical Continuous Buzzer Electric Piezo Buzzer Home Security Alarm 2-Wire Connector 3-24v Dc Voltage 3pcs*5