... 1. With RS485 bus cummunication; 2. Access control display; 3. 8 English words display; 4. Multi-language can be optional Specification:Working ... to 60 degrees;5. RS 485 communication interface, the display shows real-time information, communications can reach one kilometer distance ... ; 6. Supporting a wide range of display mode; 7. Built-in real-time clock circuitry, supports ...