From Essex Electronics, the KE-325 is a secured, stand-alone, multiple-user access control system designed for residential and commercial applications. The system features an Essex proprietary piezo-electric weatherproof, vandal-resistant keypad with billion-cycle switch technology. Other features of this keypad programmable system include 100 user codes, two SPDT relays with programmable output times, a restricted access input, remote bypass, anti-tailgating, tamper alarm and latching. The system requires a 12 to 24V AC/DC power supply.