Grant access to your home, office, or other sensitive area by keypad code or proximity card, without the risk of unauthorized entry by tampering, with the Seco-Larm Enforcer Split Series Keypad with Proximity Card Reader. While the keypad/proximity reader itself installs outside the door, its computing controller installs inside (connected to the keypad by wiring through the wall), thereby preventing potential intruders from tampering with the controller. All settings are safely protected indoors. And the keypad remains easy to use. To unlock your door, simply enter your code or wave an authorized proximity card/tag (sold separately) within 1-1/2 inches of the keypad.