The Company J has 2 units of turnstiles ,they want to accept the turnstiles by fingerprint or card in different time.

In the normal working time, all the people should identify the fingers to accept the gurnstile, and in the evening or rest time, all the people should identify the finger plus card to enter into the turnstile.

Now what we can do is that we build one unit of BF5 and one unit of BF41 inside. and we build one unit of BF808 with BF5 and BF41 together. then the user can switch the button to change the setting.