Odseven 3.5-5.5V Standard Passive Buzzer Module For Arduino
$1.27
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Specification: Working voltage: 3.5-5.5VWorking current: <25mAPCB Dimension: 18.5mm x 15mm(L x W)Feature: No oscillation source, need square wave (frequency 2K-5K ) to drive.Sound frequency control, you can make a "do re mi fa sol la si" effect.Package included:1 x Standard Passive Buzzer Module
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