... ONLENSE hotel lock, computer, lock software, Encoder, T5557card or Mifare-1 card, energy saving switch A. System ConstructionONLENSE set of locks ... , computer, management software, Encoder, T5557card or Mifare-1 card, energy saving switch B. Multiple functions 1. Five levels ... together to ensure security.3. Cipher coding to key card Each card has a different code that cannot be copied. ...