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Advanced Algorithm and Acquisition Chip: Our fingerprint sensor is equipped with a built-in algorithm chip along with a circular acquisition chip.

Fingerprint Reader, Fingerprint Sensor, R503 Circular Capacitive Fingerprint Identification Module with 2-Color Ring Indicator Light

Rugged Panel Mount Fingerprint Sensor with Bi-Color LED Ring [R503] : ID 4651 : $39.95 : Adafruit Industries, Unique & fun DIY electronics and kits

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DEALPEAK DC 3.3V R503 Circular Capacitive Fingerprint Identification Module with 2-Color Ring Indicator Light, Easy to Install : Electronics

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R503 Capacitive Fingerprint Scanner Round Fingerprint Sensor

Fingerprint Scanner, Capacitive Fingerprint Module, Capacitive Fingerprint Identification Module, for Safety Box Access Control Assistance

Fingerprint Scanner, Capacitive Fingerprint Module, Capacitive Fingerprint Identification Module, for Safety Box Access Control Assistance

Rugged Panel Mount Fingerprint Sensor with Bi-Color LED Ring [R503] : ID 4651 : $39.95 : Adafruit Industries, Unique & fun DIY electronics and kits

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Interfacing R502/R503 Capacitive Fingerprint Sensor with Arduino

Interfacing R502/R503 Capacitive Fingerprint Sensor with Arduino