Abstract: A lock unit is provided with a housing that includes a key-receiving body, a biometric sensor and a control circuit. The key-receiving body is arranged to receive a key therein. The biometric sensor is adapted to receive a biometric input from a user of the lock unit and to provide an output signal representative of biometric data associated with that user. The control circuit is coupled to the biometric sensor and is arranged when actuated to store the biometric data therein. The control circuit is coupled to the key-receiving body and is operative upon selected positioning of a key in the key-receiving body to actuate the control circuit. The biometric data is thereupon stored in the control circuit so that subsequent receipt of a biometric input corresponding to the stored biometric data enables the lock unit to open.