... screen switch fpr hotel with door bell, clean, do not disturb, wait functions Specifications1. Multicolor combination, Modular design ... made welcome1 .With the special card, you can open the door, and just insert the same car, ... for any kinds of the same size cards. This model is special suitable for Mifare card. 2 ... because you would also like to use this card to open the door when you back),Energy saving ...