IDEAL FOR ANY OUTDOOR FACILITY - Rugged and vandal-proof design, PCB is sealed in epoxy completely, making it is ideal for any outdoor facility or modern indoor office space | WIDE RANGE OF POWER INPUT - Not only DC12-24V but also AC12-24V can power this access control keypad | 4 KINDS OF ACCESS MODE. Card or PIN, card + PIN, only card, multi cards/PINs | UNIVERSAL FOR GATE OPENER OF GARAGE, WAREHOUSE - Built-in relay, dry contact output, and the output time can be set from 50ms - 99s. Also the relay can be set to ON/OFF Toggle Mode. Working Temp.: -40°F ~ 140°F (-40°C ~ 60°C) | BACKLIGHT OF THE KEYS AND SALIENT POINT ON KEY 5 - Easy to operate at night. And there is a salient point on key 5, making the blind can also open the door by pin