RS-485 communication interface
 Supporting WG port for anti-pass-back function
 Selectable working frequencies: 125kHz
 User capacity: 16,000; Event log: 32,000
 3 access modes: Card only, Card or PIN, Card and PIN
 Built-in Watchdog to prevent system from abnormal end
 Built-in Real Time Clock & Anti-Tamper functions
 Including the input of door contact, offering the alarm system when door is opened too long or forced to open
 Built-in Dual-Output: Door Lock(support Security trigger signal)/ Alarm
 11 sets of Time Zone for various accessing in network
 2 sets of Auto-Open Zone editable by stand-alone operation
 Intelligent switch function, AR-331E will switch to stand-alone or networking mode according to the system connection smartly
 Auto-lock of the keypad for 30 seconds after continuous failed operation by 3 times
 AR-331E with software provides further applications such as access control, time attendance, payroll and image-monitor
 Flexible to integrate with other equipment
 Illuminative Keys, 2 LED and 1 beeper for identification
 Use the illuminated Touch-panel for keypad, bring the new trend for access control.
 Metal Housing, fashion and the safety design.
 Narrow body design, suitable for installation in space limited areas.