It's rated for up to 9Vpp use but you can also use 3V square waves and its plenty loud. For music use with an Arduino, check out the Tone tutorial. For sensing, the Knock tutorial is your guide! There are thin wires attached, we plugged them into a solderless breadboard, but they might too thin to plug in directly into the Arduino socket headers.
Resonant Frequency: 8kHz
Max Rated Current: 3.0mA
Rated Voltage: 9V
Operating Temperature: -20oC ~ 70oC
Maximum Input Voltage: 40V
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