They are five-star locks made of pure cuprum,and come with European style.In-line electronic circuit,reading IC(ID) card in card reader;Triple password confirmation function(system password,user password,card password),completely avoid and stop the breaking of invalid card;With function of inquiry,report the loss,delete blacklist,stat.etc; Great amount of storage,it can store 255 user cards(the capacity can be bigger) and save 500 unlock records(the capacity can be bigger);Inductive,untouched,long service life;Can filtrate the recorded data at any moment;With mechanical key in support; Widely used in hotel, guesthouse,office and household,etc; Can be controlled by software and support the online-network function.