A biometric device is a security identification and authentication device. Such devices use automated methods of verifying or recognising the identity of a living person based on a physiological or behavioral characteristic. These characteristics include fingerprints, facial images, iris and voice recognition.
As you look for biometric devices online, you will these devices are roughly split into Time Attendance (TA) systems and Access Control (AC) systems. The former is used solely to record the IN and OUT time of each employee, while the latter is designed for gaining access to the office.