book contactless proximity card access controller is the modern 90-degree one system . it selects new arrival central processor ( cpu ) and large capacity memory chip , all data won’t because power-off and lost . powerful function , the 1690s proximity card sliding sensor card password open the door , cryptograph three kinds of the door open the door way door condition monitoring , output alarm , safe mode , antiwithdrawal , proximity card password complete security measures men make the user safety door open button , doorbell remind the closed door , can , normally open or often atresia etc powerful function make the user more convenient . book products provide a kind ann fully-automatic ‘s pop-hole system , commercial agencies , is office , factory , residential , residential areas ideal device .