Before revision: Contact Devices - These types of devices need contact of body part of live persons and mainly comprises of Fingerprint Scanner again which may of of Single fingerprint, dual fingerprint or Slap (4+4+2) fingerprint scanner.
After revision: Types of Biometric DevicesThere are two categories of biometric devices,Contact Devices - These types of devices need contact of body part of live persons and mainly comprises of Fingerprint Scanner again which may of of Single fingerprint, dual fingerprint or Slap (4+4+2) fingerprint scanner.