-TCP/ IP 1 handle 1 doors/ 2 readers TCP/ IP 2 handle 2 doors/ 4 readers TCP/ IP 4 handle 4 doors/ 4 readers With a single controller. -Door broken detective function, Micro switch designed to protect Reader case damage -Provides four relays output for using two alarms and two door locks -Enforcing access code function Is for emergencies, auto dial The managing center in real-time When the door is opened by force -Stand-alone or online with PC, Which can be connected with up to 255 sets Provides dual access control