... circuit board Electronic, didgi biometric sensor readers,Module, optics fingerprintFingerprint Module,fingerprint lock password lock Control panels circuit ... : ningbo deya electronicElectronic, didgital, keypin, card swipe, biometric,optics fingerprint readers/sensorDeya series of stand-alone fingerprint identification module ... 0x21, 0x22, etc.), repeat step 1; need other information ,pls email me