1.Opened by Inductive card,untouched,long service life; 2.Triple password confirmation function(system password,user password, card password),completely avoid and stop the breaking of invalid card; 3.With function of inquiry,report the loss,delete blacklist,stat.etc; 4.Great amount of storage,it can hold 1000users and save 500records;With network function. 5.Widely used in community,guesthouse,office and household,etc;