Smart Design with Zinc Alloy Material, Single latch mortise ( replace any existing single latch for keyless entry convenience), Customizable access codes for increased security, Backlit keypad for increased visibility, Hidden Cylinder for mechanical overise (maintaining security and elegance of the lock), Operating Frequency: 13.56 MHz with Mifare Sensor from Phillips, Reading distance: 2 cms, Card Capacity: 100, Code capacity: 100, templates, Powered by 4 x AA batteries with normal operation life of approx. 1 year, Waterproof, dust proof, Shock proof and Fireproof, Selflocking protection, Low power alarm function,