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R503 New RGB Ring Indicator Light LED Control Round Fingerprint Module Access Control Arduino - AliExpress
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Amazon.com : Fingerprint Identification Module, Capacitive Fingerprint Recognition Module with 2-Color Ring Indicator Light for Access Control/Assistance/Safety Box : Electronics
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Amazon.com : DEALPEAK DC 3.3V R503 Circular Capacitive Fingerprint Identification Module with 2-Color Ring Indicator Light, Easy to Install : Electronics
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