<ul><li>[Internal Oscillation Source] This active buzzer alarms continuously when powered on, ensuring effective alerts.</li><li>[Driven by 9012 Transistor] performance with the included transistor for seamless .</li><li>[Easy Installation] Designed with fixing holes for simple and convenient mounting with bolts.</li><li>[Wide Compatibility] Connects to 3.3v-5v micro-controllers directly for versatile use in various devices.</li><li>[Program Control] Easily programmable with high and low level settings, outperforming passive buzzers.</li></ul><br><br>

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