... 3.door security 4.automatic door access plat card reader,Can set 250 users' cards and 250 ... , can set 6 number freely. Reads the card or put in the password number. The connection ... to connect the wires , has strong power of card-reading. The distance should be no less than ... opening the door: there are three ways : induction card, induction card + password, and monthly password. Power supply: voltage ...