Features: 1) One door RFID access controller with built-in reader 2) Supports RS485 and TCP/IP communication simultaneously; 3) With external controller plate (DVIO module) to ensure high security 4) Can be connected to different brands card readers, such as EM/Mifare/TI, 5) Patent multi-communication transmission module, which can expands the region of the controlling door of 2/4/8/16/32 till 128 doors; 6) 12 keystrokes as mobile phones; Red backlight; 7) LCD high resolution 128 x 80 ratio pixel mobile phones; Blue/red backlights 8) Mass adoption of components of mobile phones, with the size of ordinary mobile phones