... .Low battery alarm; 4.Low energy consumption High quality hotel room card lock system DH8015-Y Mifare ... alloy(stainless steel or copper) once, with high securicty and solidty nature.2,Intellectual ultrathin ... me show you the Hotel door lock confirguration-- Computer(to install the software), card encoder, cards, ... from lock and read them on computer Any question or interesting, could cotact us anytime ...