Features:_x000D_ 1. 100% Brand new and high quality RS485 Board._x000D_ 2. No need external power, powered by USB port._x000D_ 3. LED display of communication data._x000D_ 4. Machine PLC data reading and writing._x000D_ 5. Monitoring data read and write, and PTZ control._x000D_ 6. Centralized control of household electrical appliances._x000D_ 7. Access Control System: Card._x000D_ 8. A variety of industrial automation: Instrumentation._x000D_ 9. Parking: Bus Fees._x000D_ 10. Dining Hall: Staff Attendance._x000D_ 11. Highway toll station: ATM machine._x000D_ _x000D_ Specification:_x000D_ Condition: 100% Brand New_x000D_ Item Type: USB Serial Converter_x000D_ Material: Plastic_x000D_ Color: Black_x000D_ Temperature Range: -40C - 85C_x000D_ Communication Distance: 1200 m(maximum)_x000D_ Product Size: Approx. 6.0*1.7*1.8cm / 2.4*0.67*0.7inch_x000D_ _x000D_ Package list:_x000D_ 2 x USB to RS485_x000D_ _x000D_ Notes:_x000D_ 1. The actual product color may deviate from the photo due to light._x000D_ 2. There may be a slight deviation in the measurement of product.