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RFID Proximity Entry Lock Door Access Control System Here is a Door Access Control Keypad RFID Card Reader which has the Elegant design, you can use it to increase your home and office security! it is quite easy to use! Features: Contactless RFID transponder technology With anti-break alarm function Full programming from the keypad Support Card, PIN, Card + PIN Connection for external release button(Exit button) Build in RFID reader User capacity: 500users ( each card only can add one password) Does not need to connect on the computer, it can works alone. Specifications: Operating Voltage: 12VDC + 10%; Current 1.2A Lock Relay: 12VDC/2A Environmental temperature: working:0°C~45°C; storage:-10°C~55°C Relative humidity:working: 40%~90%RH;storage:-20%~90%RH RFID Card Capacity: 255 cards, a "Personal PIN"